The tab bar is always forced to light mode on iOS 26 when "Reduce Transparency" is on

首先运行 ./apps/example/ 中的示例应用，并按照 App() 设置进行操作，在启用深色模式和 Reduce Transparency 的情况下复现原生标签栏。通过检查标签栏在该设置下是否跟随系统的深色外观，同时在禁用 Reduce Transparency 时保留已报告的行为，确认完成。

Before submitting a new issue

• I tested using the latest version of the library, as the bug might be already fixed.
• I tested using a supported version of react native.
• I checked for possible duplicate issues, with possible answers.

Bug summary

On iOS 26 with the new Liquid Glass style tab bar, the background and icon appearance is always in light mode despite system setting, when the accessibility option "Reduce Transparency" is enabled in the iOS settings. When the accessibility setting is not enabled, the tab bar responds to system appearance and content in the background normally. Calling Appearance.setColorScheme('dark') and/or using DarkTheme for the Native stack navigator has no effect on this issue. This does not seem to be a bug in iOS 26 itself, nor is the tab bar supposed to be in light mode when the accessibility setting is enabled, as in Apple's own native apps the tab bar behaves normally (as shown in the example screenshot of Shortcuts below).
This issue can be replicated with the example app in this repo.

Screenshots
Reduce Transparency enabled and system set to dark theme, issue with the tab bar occurs.

Reduce Transparency disabled, issue does not occur.

Apple's Shortcuts app for comparison. No issue with Reduce Transparency setting.

The screenshots are from a simulator but the issue occurs on actual devices too.

Library version

0.11.2

Environment info

System:
  OS: macOS 15.6.1
  CPU: (8) arm64 Apple M1 Pro
  Memory: 626.77 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.19.5
    path: /opt/homebrew/opt/node@20/bin/node
  Yarn:
    version: 4.6.0
    path: /opt/homebrew/opt/node@18/bin/yarn
  npm:
    version: 10.8.2
    path: /opt/homebrew/opt/node@20/bin/npm
  Watchman:
    version: 2025.09.15.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 25.0
      - iOS 26.0
      - macOS 26.0
      - tvOS 26.0
      - visionOS 26.0
      - watchOS 26.0
  Android SDK: Not Found
IDEs:
  Android Studio: 2025.1 AI-251.26094.121.2512.13991807
  Xcode:
    version: 26.0/17A324
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.16
    path: /usr/bin/javac
  Ruby:
    version: 3.4.6
    path: /opt/homebrew/opt/ruby/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react: Not Found
  react-native: Not Found
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: Not found
  newArchEnabled: Not found
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

Steps to reproduce

1. Install the example app from this repo.
2. (Optionally) call Appearance.setColorScheme('dark') in the App() function and set NavigationContainer theme prop to DarkTheme (imported from '@react-navigation/native').
3. In iOS Settings app, set system theme to dark and in Accessibility -> Display & Text size, enable Reduce Transparency.
4. In the example app, navigate to an example with a native tab bar.

Reproducible sample code

./apps/example/ from this repository.