Outline Xamarin Firebase Cloud Messaging Notifications VS solution (simple, but it must work on Android 12)

I need a 'nearly empty' Visual Studio 2022 Xamarin solution, C#, with Android and IOS projects, that users the FirebasePushNotificationPlugin (https://github.com/CrossGeeks/FirebasePushNotificationPlugin) – or similar - and which will deploy to an android device running Android 12 (tested using the Pixel 4a emulator). The project must be capable of receiving and properly displaying Firebase notifications (NOT debug pop-ups). It should be able to do this when the app is in foreground or background mode. I have a project that works on version 11 and below, but there is something new in 12 that is stopping me from proceeding (possibly the need to define services in the Manifest - I am not an expert, I just get messages like '0 deployed', 'there was an error', and I am fed up with it!). The project should use the default Xamarin.Forms Shell flyout menu layout. The solution name should be FBXamarin. The solution should not use Prism or other such extensions (because I am already using Syncfusion). The community toolset is OK, though. The deliverable is the complete solution, zipped. The job will be considered completed when I can deploy the solution and receive a Firebase message from my own (or your) firebase account, as described above.