Steps I followed:
I uploaded APNs Auth Key on Firebase. (I assume this is for both development and release environments.)
On the Flutter app, I got the iOS APNs token and I generated FCM token as well.
On the Firebase notifications composer, I wanted to send a test notification. So, I added the FCM token. I backgrounded/killed/quit the app. Waited on the lock screen to receive notifications. There is one development entitlement file in the Flutter iOS side.
I followed the steps mentioned here - https://firebase.google.com/docs/cloud-messaging/flutter/client
Not sure what's wrong, but I'm not receiving any test notifications. Can someone please help out?