I'm trying to configure Firebase in a React Native 0.79.1 app using the new architecture. The AppDelegate.swift file format has changed in RN 0.79+, and FirebaseApp.configure() does not seem to initialize Firebase properly when added to this file.

Environment:

React Native version: 0.79.1

Firebase module: @react-native-firebase/app (or whatever module you're using)

macOS version:15.2

Xcode version: 16.0

Cocoapods version: 1.16.2

iOS deployment target: ios 18

Steps to reproduce:

Install Firebase via CocoaPods.

Add FirebaseApp.configure() to AppDelegate.swift.

Run the app using yarn ios.

Expected behavior: Firebase should initialize successfully without errors.

Actual behavior: Firebase is not initialized, or no logs confirm that FirebaseApp.configure() ran successfully. Sometimes other Firebase modules throw "not configured" errors.

AppDelegate.swift Code:

import UIKit
import React
import React_RCTAppDelegate
import ReactAppDependencyProvider
import FirebaseCore

@main
class AppDelegate: UIResponder, UIApplicationDelegate {
  var window: UIWindow?

  var reactNativeDelegate: ReactNativeDelegate?
  var reactNativeFactory: RCTReactNativeFactory?

  func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil
  ) -> Bool {

    FirebaseApp.configure()

    let delegate = ReactNativeDelegate()
    let factory = RCTReactNativeFactory(delegate: delegate)
    delegate.dependencyProvider = RCTAppDependencyProvider()

    reactNativeDelegate = delegate
    reactNativeFactory = factory

    window = UIWindow(frame: UIScreen.main.bounds)

    factory.startReactNative(
      withModuleName: "skyzone",
      in: window,
      launchOptions: launchOptions
    )

    return true
  }
}

Additional context: I've verified the GoogleService-Info.plist file is added to the correct target. I’ve also confirmed that Firebase is installed via pod install. No compile-time errors are present, but Firebase is not functioning as expected.