For context: I recently switched to a Pixel 9, installed GrapheneOS and created a profile just for some apps I need Play Store for, which is sandboxed btw. I created a new empty google account for it too.

So I was just downloading an app and saw the option to download it on my old device too, which made me wonder how GP knows about it, since I don’t think I have anything on my new phone that could link to it (except my SIM I guess)

Any ideas?