[Catalyst] Fix Scrollbar does not align with FlowDirection change in ScrollView (#30241)

* fix added

* Revert "fix added"

This reverts commit 138797f.

* fix added

* fix updated

Author: devanathan-vaithiyanathan

src/Core/src/Platform/iOS/MauiScrollView.cs

@@ -58,6 +58,20 @@ public override void LayoutSubviews()
 				// arrangement with an adjusted starting point and recalculating the content offset.
 				if (_previousEffectiveUserInterfaceLayoutDirection != EffectiveUserInterfaceLayoutDirection)
 				{
+					// In mac platform, Scrollbar is not updated based on FlowDirection, so resetting the scroll indicators
+					// It's a native limitation; to maintain platform consistency, a hack fix is applied to show the Scrollbar based on the FlowDirection.
+					if (OperatingSystem.IsMacCatalyst() && _previousEffectiveUserInterfaceLayoutDirection is not null)
+					{
+						bool showsVertical = ShowsVerticalScrollIndicator;
+						bool showsHorizontal = ShowsHorizontalScrollIndicator;
+
+						ShowsVerticalScrollIndicator = false;
+						ShowsHorizontalScrollIndicator = false;
+
+						ShowsVerticalScrollIndicator = showsVertical;
+						ShowsHorizontalScrollIndicator = showsHorizontal;
+					}
+                    
 					if (EffectiveUserInterfaceLayoutDirection == UIUserInterfaceLayoutDirection.RightToLeft)
 					{
 						var horizontalOffset = contentSize.Width - crossPlatformBounds.Width;