Useful or not, from you.
react-native-firebase Use of undeclared identifier FIRApp while archive only.

I am using react-native-firebase for authentication, cloud messaging, analytics, remote config, admob. I am successfully run the app in my physical device. But i got the error Use of undeclared identifier 'FIRApp' when I am trying to archieve my build..

That's a useful answer
Without any help

you can put it on #if DEBUG in applegate.m