I have an app with the "Driving Task" CarPlay entitlement. When I ask for permission for notifications in CarPlay (UNAuthorizationOptionCarPlay), and I check "carPlaySetting" in the UNNotificationSettings after granting permission, it get a value "UNNotificationSettingNotSupported" (the setting is not available to your app).
Is this a bug? It feels like one. The app shows distances to some locations, and provides warnings to the user when approaching those locations. It is common for my users to use it at the same time they use a navigation app and switch between the two apps. But when they have the navigation app in foreground, they ask why my app is not showing notifications when giving an audio warning.
The notifications are not even shown on the screen of the iPhone, the screen is turned off in iPhone 14 Pro when connecting to CarPlay, and the screen does not turn on when the app is in background in CarPlay and tries to show a notification.