initializeApp not working on iOS device

I'm converting an app from the old @nativescript/firebase library, and this is just about complete and fully functional on Android. I just tried running this on iOS, and the app is not initializing properly. In looking through firebase-core/index.ios.js, I've discovered that my initialization request is being added to the launchQueue array, but launchCallback is never being called.

There are no errors shown in the logs, so from what I can see the issue is just that this launchQueue is never being used.

I have the same GoogleService-Info.plist file as before in App_Resources/iOS. These are the relevant parts of the main.js file that's acting as the entry point:

import { firebase } from '@nativescript/firebase-core'
import '@nativescript/firebase-auth';
import '@nativescript/firebase-crashlytics';
import '@nativescript/firebase-analytics';
import '@nativescript/firebase-messaging';

// Initialize Firebase
firebase().initializeApp().then(() => {
  console.warn('🔥 Firebase initialized');
}).catch(error => {
  console.error('🔥 Firebase initialization error: ', error)
});

If I log to the console right before firebase().initializeApp() on iOS I see the log, but the 'Firebase initialized' log never appears. Adding additional logs in firebase-core/index.ios.js shows me that UIApplication.sharedApplication is null when checked, so the call to initApp is appended to the launchQueue array and then never used.

firebase-core/index.ios.js と main.js の initializeApp 呼び出しから始めます。iOS の起動時に UIApplication.sharedApplication、launchQueue、launchCallback がどのように処理されるかを追跡します。iOS デバイス上で初期化が完了し、既存の成功またはエラーのコールバックに到達すれば完了です。報告された logging シナリオで確認してください。