Help Needed Firebase iOS Notifications Issue in React Native

I’ve set up Firebase for Android in a React Native app with Expo, and it works fine. However, I can’t get Firebase notifications to work on iOS, even though the build is successful and I receive the token.

I need:

Someone to help configure Firebase for iOS notifications.
A document detailing the issues found and the fixes applied.
Skills:

Firebase setup for iOS.
React Native and Expo experience.
Please contact me if you can help.

Thanks!