fontVariant doesn't work on iOS when using the new architecture

[j-piasecki]

Description

fontVariant prop on the Text component has no effect on iOS when using the new architecture.

On Android it's not applied unless fontWeight is also set to any value, possibly some other props but I haven't tested all of them. This behavior is consistent with the old architecture, though iOS on the old arch works correctly without setting fontWeight.

Steps to reproduce

1. Install the application on Android and on iOS
2. On Android font variants specified in styles are applied only when fontWeight is set
3. On iOS font variants aren't applied at all

React Native Version

0.73.6

Affected Platforms

Runtime - iOS

Areas

Fabric - The New Renderer

Output of npx react-native info

System:
  OS: macOS 14.2.1
  CPU: (8) arm64 Apple M1 Pro
  Memory: 243.70 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.10.0
    path: ~/.nvm/versions/node/v20.10.0/bin/node
  Yarn:
    version: 1.22.19
    path: /opt/homebrew/bin/yarn
  npm:
    version: 10.2.3
    path: ~/.nvm/versions/node/v20.10.0/bin/npm
  Watchman:
    version: 2023.01.16.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.14.3
    path: /Users/jakubpiasecki/.rvm/gems/ruby-2.7.5/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.2
      - iOS 17.2
      - macOS 14.2
      - tvOS 17.2
      - watchOS 10.2
  Android SDK:
    API Levels:
      - "24"
      - "26"
      - "28"
      - "29"
      - "30"
      - "31"
      - "32"
      - "33"
      - "34"
    Build Tools:
      - 26.0.3
      - 28.0.3
      - 29.0.2
      - 29.0.3
      - 30.0.2
      - 30.0.3
      - 31.0.0
      - 32.0.0
      - 32.1.0
      - 33.0.0
      - 33.0.1
      - 34.0.0
    System Images:
      - android-28 | Google ARM64-V8a Play ARM 64 v8a
      - android-33 | Google APIs ARM 64 v8a
      - android-34 | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2023.2 AI-232.10227.8.2321.11479570
  Xcode:
    version: 15.1/15C65
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.2
    path: /usr/bin/javac
  Ruby:
    version: 2.7.5
    path: /Users/jakubpiasecki/.rvm/rubies/ruby-2.7.5/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.6
    wanted: 0.73.6
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

### Stacktrace or Logs

```text
There are no logs

Reproducer

https://github.com/j-piasecki/font-variant-repro

Screenshots and Videos

[artymir]

Same issue on 74.5