GrapheneOS thanks so much for replying, from your response, it sounds like you've been in dialogue with google to understand they are migrating away at some point .
I understand gms might need this for whatever reason, my question was based on my curiosity to what the apk might contain and how to get hold of it to analysis it. I'm no security researcher but I would like to know how to get ahold of the apk, for example, would adb have access to it?