diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h
index 71739d159ff40c..f6a35caf3f0cb3 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h
@@ -109,7 +109,6 @@
 /// @return: `YES` to use RuntimeScheduler, `NO` to use JavaScript scheduler. The default value is `YES`.
 - (BOOL)runtimeSchedulerEnabled;
 
-#if RCT_NEW_ARCH_ENABLED
 @property (nonatomic, strong) RCTSurfacePresenterBridgeAdapter *bridgeAdapter;
 
 /// This method returns a map of Component Descriptors and Components classes that needs to be registered in the
@@ -139,6 +138,4 @@
 /// Return the bundle URL for the main bundle.
 - (NSURL *)bundleURL;
 
-#endif
-
 @end
diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
index 3f3bb759ba63e8..414534f9fb4dbe 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppDelegate.mm
@@ -13,7 +13,6 @@
 #import "RCTAppSetupUtils.h"
 #import "RCTLegacyInteropComponents.h"
 
-#if RCT_NEW_ARCH_ENABLED
 #if RN_DISABLE_OSS_PLUGIN_HEADER
 #import <RCTTurboModulePlugin/RCTTurboModulePlugin.h>
 #else
@@ -51,19 +50,13 @@ @interface RCTAppDelegate () <
 }
 @end
 
-#endif
-
 static NSDictionary *updateInitialProps(NSDictionary *initialProps, BOOL isFabricEnabled)
 {
-#ifdef RCT_NEW_ARCH_ENABLED
   NSMutableDictionary *mutableProps = [initialProps mutableCopy] ?: [NSMutableDictionary new];
   // Hardcoding the Concurrent Root as it it not recommended to
   // have the concurrentRoot turned off when Fabric is enabled.
   mutableProps[kRNConcurrentRoot] = @(isFabricEnabled);
   return mutableProps;
-#else
-  return initialProps;
-#endif
 }
 
 @interface RCTAppDelegate () <RCTCxxBridgeDelegate> {
@@ -72,12 +65,9 @@ @interface RCTAppDelegate () <RCTCxxBridgeDelegate> {
 @end
 
 @implementation RCTAppDelegate {
-#if RCT_NEW_ARCH_ENABLED
   RCTHost *_reactHost;
-#endif
 }
 
-#if RCT_NEW_ARCH_ENABLED
 - (instancetype)init
 {
   if (self = [super init]) {
@@ -87,25 +77,20 @@ - (instancetype)init
   }
   return self;
 }
-#endif
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
-  BOOL enableTM = NO;
-  BOOL enableBridgeless = NO;
-  BOOL fabricEnabled = NO;
-#if RCT_NEW_ARCH_ENABLED
-  enableTM = self.turboModuleEnabled;
-  enableBridgeless = self.bridgelessEnabled;
-  fabricEnabled = [self fabricEnabled];
-#endif
+  BOOL enableTM = self.turboModuleEnabled;
+  ;
+  BOOL enableBridgeless = self.bridgelessEnabled;
+  BOOL fabricEnabled = self.fabricEnabled;
+
   NSDictionary *initProps = updateInitialProps([self prepareInitialProps], fabricEnabled);
 
   RCTAppSetupPrepareApp(application, enableTM);
 
   UIView *rootView;
   if (enableBridgeless) {
-#if RCT_NEW_ARCH_ENABLED
     // Enable native view config interop only if both bridgeless mode and Fabric is enabled.
     RCTSetUseNativeViewConfigsInBridgelessMode(fabricEnabled);
 
@@ -123,7 +108,6 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
         sizeMeasureMode:RCTSurfaceSizeMeasureModeWidthExact | RCTSurfaceSizeMeasureModeHeightExact];
 
     rootView = (RCTRootView *)surfaceHostingProxyRootView;
-#endif
   } else {
     if (!self.bridge) {
       self.bridge = [self createBridgeWithDelegate:self launchOptions:launchOptions];
@@ -170,10 +154,7 @@ - (UIView *)createRootViewWithBridge:(RCTBridge *)bridge
                           moduleName:(NSString *)moduleName
                            initProps:(NSDictionary *)initProps
 {
-  BOOL enableFabric = NO;
-#if RCT_NEW_ARCH_ENABLED
-  enableFabric = self.fabricEnabled;
-#endif
+  BOOL enableFabric = self.fabricEnabled;
   UIView *rootView = RCTAppSetupDefaultRootView(bridge, moduleName, initProps, enableFabric);
 
   rootView.backgroundColor = [UIColor systemBackgroundColor];
@@ -223,7 +204,37 @@ - (void)windowScene:(UIWindowScene *)windowScene
 #endif
 }
 
+#pragma mark - New Arch Enabled settings
+
+- (BOOL)turboModuleEnabled
+{
+#if RCT_NEW_ARCH_ENABLED
+  return YES;
+#else
+  return NO;
+#endif
+}
+
+- (BOOL)fabricEnabled
+{
 #if RCT_NEW_ARCH_ENABLED
+  return YES;
+#else
+  return NO;
+#endif
+}
+
+- (BOOL)bridgelessEnabled
+{
+  return NO;
+}
+
+#pragma mark - RCTComponentViewFactoryComponentProvider
+
+- (NSDictionary<NSString *, Class<RCTComponentViewProtocol>> *)thirdPartyFabricComponents
+{
+  return @{};
+}
 
 #pragma mark - RCTTurboModuleManagerDelegate
 
@@ -254,30 +265,6 @@ - (Class)getModuleClassFromName:(const char *)name
   return RCTAppSetupDefaultModuleFromClass(moduleClass);
 }
 
-#pragma mark - RCTComponentViewFactoryComponentProvider
-
-- (NSDictionary<NSString *, Class<RCTComponentViewProtocol>> *)thirdPartyFabricComponents
-{
-  return @{};
-}
-
-#pragma mark - New Arch Enabled settings
-
-- (BOOL)turboModuleEnabled
-{
-  return YES;
-}
-
-- (BOOL)fabricEnabled
-{
-  return YES;
-}
-
-- (BOOL)bridgelessEnabled
-{
-  return NO;
-}
-
 #pragma mark - New Arch Utilities
 
 - (void)unstable_registerLegacyComponents
@@ -324,6 +311,4 @@ - (NSURL *)bundleURL
   return nullptr;
 }
 
-#endif
-
 @end
diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.h b/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.h
index e1c69078409caf..d661fb4355c1c1 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.h
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.h
@@ -26,28 +26,23 @@
 #endif
 #endif
 
-#if RCT_NEW_ARCH_ENABLED
 #import <ReactCommon/RCTTurboModuleManager.h>
-#endif
 
 // Forward declaration to decrease compilation coupling
 namespace facebook::react {
 class RuntimeScheduler;
 }
 
-#if RCT_NEW_ARCH_ENABLED
-
 RCT_EXTERN id<RCTTurboModule> RCTAppSetupDefaultModuleFromClass(Class moduleClass);
 
 std::unique_ptr<facebook::react::JSExecutorFactory> RCTAppSetupDefaultJsExecutorFactory(
     RCTBridge *bridge,
     RCTTurboModuleManager *turboModuleManager,
     const std::shared_ptr<facebook::react::RuntimeScheduler> &runtimeScheduler);
-#else
+
 std::unique_ptr<facebook::react::JSExecutorFactory> RCTAppSetupJsExecutorFactoryForOldArch(
     RCTBridge *bridge,
     const std::shared_ptr<facebook::react::RuntimeScheduler> &runtimeScheduler);
-#endif
 
 #endif // __cplusplus
 
diff --git a/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.mm b/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.mm
index 6241f62831cf40..3127588b7de0a1 100644
--- a/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.mm
+++ b/packages/react-native/Libraries/AppDelegate/RCTAppSetupUtils.mm
@@ -11,7 +11,6 @@
 #import <react/renderer/runtimescheduler/RuntimeScheduler.h>
 #import <react/renderer/runtimescheduler/RuntimeSchedulerBinding.h>
 
-#if RCT_NEW_ARCH_ENABLED
 // Turbo Module
 #import <React/RCTBundleAssetImageLoader.h>
 #import <React/RCTDataRequestHandler.h>
@@ -24,13 +23,10 @@
 // Fabric
 #import <React/RCTFabricSurface.h>
 #import <React/RCTSurfaceHostingProxyRootView.h>
-#endif
 
 void RCTAppSetupPrepareApp(UIApplication *application, BOOL turboModuleEnabled)
 {
-#if RCT_NEW_ARCH_ENABLED
   RCTEnableTurboModule(turboModuleEnabled);
-#endif
 
 #if DEBUG
   // Disable idle timer in dev builds to avoid putting application in background and complicating
@@ -42,18 +38,15 @@ void RCTAppSetupPrepareApp(UIApplication *application, BOOL turboModuleEnabled)
 UIView *
 RCTAppSetupDefaultRootView(RCTBridge *bridge, NSString *moduleName, NSDictionary *initialProperties, BOOL fabricEnabled)
 {
-#if RCT_NEW_ARCH_ENABLED
   if (fabricEnabled) {
     id<RCTSurfaceProtocol> surface = [[RCTFabricSurface alloc] initWithBridge:bridge
                                                                    moduleName:moduleName
                                                             initialProperties:initialProperties];
     return [[RCTSurfaceHostingProxyRootView alloc] initWithSurface:surface];
   }
-#endif
   return [[RCTRootView alloc] initWithBridge:bridge moduleName:moduleName initialProperties:initialProperties];
 }
 
-#if RCT_NEW_ARCH_ENABLED
 id<RCTTurboModule> RCTAppSetupDefaultModuleFromClass(Class moduleClass)
 {
   // Set up the default RCTImageLoader and RCTNetworking modules.
@@ -114,8 +107,6 @@ void RCTAppSetupPrepareApp(UIApplication *application, BOOL turboModuleEnabled)
           }));
 }
 
-#else // else !RCT_NEW_ARCH_ENABLED
-
 std::unique_ptr<facebook::react::JSExecutorFactory> RCTAppSetupJsExecutorFactoryForOldArch(
     RCTBridge *bridge,
     const std::shared_ptr<facebook::react::RuntimeScheduler> &runtimeScheduler)
@@ -134,4 +125,3 @@ void RCTAppSetupPrepareApp(UIApplication *application, BOOL turboModuleEnabled)
         }
       }));
 }
-#endif // end RCT_NEW_ARCH_ENABLED
diff --git a/packages/rn-tester/RNTester/AppDelegate.mm b/packages/rn-tester/RNTester/AppDelegate.mm
index a7fa095e5bc2e6..0692f5b4cb5eea 100644
--- a/packages/rn-tester/RNTester/AppDelegate.mm
+++ b/packages/rn-tester/RNTester/AppDelegate.mm
@@ -16,12 +16,10 @@
 #import <React/RCTPushNotificationManager.h>
 #endif
 
-#if RCT_NEW_ARCH_ENABLED
 #import <NativeCxxModuleExample/NativeCxxModuleExample.h>
 #ifndef RN_DISABLE_OSS_PLUGIN_HEADER
 #import <RNTMyNativeViewComponentView.h>
 #endif
-#endif
 
 // FB-internal imports
 #ifdef RN_DISABLE_OSS_PLUGIN_HEADER
@@ -88,11 +86,9 @@ - (void)loadSourceForBridge:(RCTBridge *)bridge
   if (name == std::string([@"SampleTurboCxxModule" UTF8String])) {
     return std::make_shared<facebook::react::SampleTurboCxxModule>(jsInvoker);
   }
-#ifdef RCT_NEW_ARCH_ENABLED
   if (name == facebook::react::NativeCxxModuleExample::kModuleName) {
     return std::make_shared<facebook::react::NativeCxxModuleExample>(jsInvoker);
   }
-#endif
   return nullptr;
 }
 
@@ -129,7 +125,6 @@ - (void)application:(__unused UIApplication *)application
 
 #pragma mark - RCTComponentViewFactoryComponentProvider
 
-#if RCT_NEW_ARCH_ENABLED
 #ifndef RN_DISABLE_OSS_PLUGIN_HEADER
 - (nonnull NSDictionary<NSString *, Class<RCTComponentViewProtocol>> *)thirdPartyFabricComponents
 {
@@ -141,6 +136,5 @@ - (NSURL *)bundleURL
 {
   return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:kBundlePath];
 }
-#endif
 
 @end