Fix flutter_braintree Payment Issue on iOS

I have an existing Flutter app using the flutter_braintree package for Braintree payments. The Braintree payment flow is currently working correctly on Android, but it is not working on iOS. I’m looking for an experienced Flutter developer who can: - Investigate the iOS-specific issue - Check the Flutter/Braintree iOS integration and native iOS configuration - Identify the root cause - Fix the issue without affecting the working Android implementation - Test and confirm the payment flow works correctly on a real iOS device The existing Flutter project and current Braintree implementation will be provided. This should be a focused bug-fix task rather than a new implementation. Please briefly mention any experience you have with Flutter payment integrations, Braintree, or native iOS SDK integration. Looking to start immediately.