Flutter App Configuration & Publishing

I need help configuring a Flutter app and publishing it on the Google Play Store. The app requires integration with Firebase services, specifically Authentication, Cloud Firestore or Realtime Database, and Push Notifications using Firebase Cloud Messaging (FCM). Once configured, I’d like assistance in ensuring the app is properly set up for Play Store submission, including meeting all guidelines and requirements for a smooth publishing process. and i will provide the app source code and app documentation based ont he developer documentation