[Android][iOS] initialize admob without google services json

[maxximee]

I use google ad manager to serve my ads and appcenter for analytics. I dont want to link and use firebase's google-services.json.
It should be possible to initialize firebase without the json config: https://stackoverflow.com/questions/41160608/google-admob-for-android-without-google-services-json
FirebaseOptions firebaseOptions = new FirebaseOptions.Builder() .setApiKey(apiKey) .setApplicationId(context.getString(R.string.google_app_id)) .build(); return FirebaseApp.initializeApp(context, firebaseOptions, "MyApp");
But not sure if this is possible with this plugin and how?