It looks like maybe you are uploading the debug package and not a release build that has the linker turned on to "link sdk assemblies". See: https://learn.microsoft.com/en-us/xamarin/android/deploy-test/release-prep/?tabs=windows and I even have a video: https://www.youtube.com/watch?v=7kVeC1_14Ag
The team is looking into it though to see if there is anything they can do. One of the warnings will go away in 16.9 -> https://github.com/xamarin/xamarin-android/pull/5304
The other around crashes is a warning because if google has those files it will give you better method names/line numbers, but in general this warning can be ignored.