[ScrollView] Large text content is not scrollable with hardware keyboard in iOS(repro provided)

Description

This issue is only observed on iOS.

When the content of the ScrollView is large enough to become scrollable and there are no focusable elements inside of it like buttons or form fields, the user can't scroll the content via hardware keyboard's up and down arrow keys.

I've found this as well which might be useful -> https://developer.apple.com/documentation/UIKit/UIScrollView/allowsKeyboardScrolling

Steps to reproduce

1. Clone the repro.
2. Install dependencies.
3. Run iOS with npm run ios or yarn ios
4. Go to simulator Settings, Accessibility, Keyboards & Typing, Full Keyboard Access, switch to ON.
5. Go to ReproducerApp.
6. Try to scroll the content with Hardware Keyboard's up and down arrow keys and observe that nothing is happening.

React Native Version

0.79.4

Affected Platforms

Runtime - iOS

Output of npx @react-native-community/cli info

System:
  OS: macOS 15.5
  CPU: (10) arm64 Apple M1 Max
  Memory: 418.52 MB / 64.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.20.5
    path: ~/.nvm/versions/node/v18.20.5/bin/node
  Yarn:
    version: 1.22.22
    path: ~/.nvm/versions/node/v18.20.5/bin/yarn
  npm:
    version: 10.8.2
    path: ~/.nvm/versions/node/v18.20.5/bin/npm
  Watchman:
    version: 2025.07.21.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/lib/ruby/gems/3.1.0/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.5
      - iOS 18.5
      - macOS 15.5
      - tvOS 18.5
      - visionOS 2.5
      - watchOS 11.5
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.2 AI-242.23726.103.2422.13016713
  Xcode:
    version: 16.4/16F6
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.10
    path: /usr/bin/javac
  Ruby:
    version: 3.1.6
    path: /opt/homebrew/opt/ruby@3.1/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 19.1.1
    wanted: 19.1.1
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.79.4
    wanted: 0.79.4
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

No crash.

MANDATORY Reproducer

https://github.com/filip-angelov/reproducer-scroll-view-issue

Screenshots and Videos

No response

Start with the linked reproducer and run it with npm run ios or yarn ios; enable Full Keyboard Access in the simulator and confirm the arrow-key failure. Read the React Native ScrollView iOS path alongside UIKit's UIScrollView.allowsKeyboardScrolling documentation. Done means large ScrollView content without focusable children scrolls with the hardware keyboard's up and down arrows.