After updating to Xcode 12.4, the Firebase Push Notifications stop working, giving me the message "Notifications are not allowed for this application".
I updated all Ionic, Angular and Capacitor packages to the latest, did some Apple certificates again, it always return this message it gets to "PushNotifications.requestPermission()".
I found the problem, my App’s name was in Portuguese and had an acute accent, with the new version of Xcode I think they removed this option.
I could keep the name of the app with acute accent, but i had to change the "Product Name" to another one.
You can change that in your xcode project
App.xcodeproj -> Targets -> Build Settings -> Packaging -> Product Name