Apple Auth and Apple IAP Testing and Fixing IOS

Job Title: React Native Developer (iOS Build & Deployment Specialist)
Project Overview:
I have a React Native (Expo SDK 52) mobile app that is code-complete but facing configuration issues during the build process. I have already implemented the logic for Apple Authentication and Apple In-App Purchases (IAP) using RevenueCat.

The Challenge:
I am currently blocked by persistent iOS build errors on EAS (Expo Application Services), likely due to conflicts between the New Architecture, Firebase, and Static Frameworks. I cannot debug locally due to hardware limitations (older Xcode).

Key Responsibilities:
Fix iOS Build Configuration:
Review app.json and package dependencies.
Resolve build conflicts to ensure a successful build on EAS.
Ensure the project compiles correctly for both Simulator and Production.

Verify & Fix Implementation:
Review my existing code for Apple Auth and RevenueCat IAP.
Test functionality on a simulator/device to ensure it works.
Fix any logic errors or bugs found during testing.

App Store Deployment:
Set up the In-App Purchase products in App Store Connect.
Upload the successful build to TestFlight.
Ensure the app is live and ready for testing by external users.

Requirements:
Strong experience with Expo (EAS) and React Native.
Deep knowledge of iOS native builds (CocoaPods, Xcode, Frameworks).
Experience implementing RevenueCat and Apple Authentication.
Access to a Mac with the latest Xcode (16+) for local debugging if necessary.