There is already an unofficial support, I'm actively developing a `with-rn-firebase` config plugin, which is going to be merged into `@react-native-firebase/app` soon.

You can follow this discussion for more details: https://github.com/invertase/react-native-firebase/discussions/5386

There's also a tutorial on using rn-firebase with Expo: https://bartlomiej-klocek.medium.com/how-to-integrate-react-native-firebase-into-expo-d34712eaf64d