What data can an app collect from a phone running regular Android vs GrapheneOS?

nubeovejita27: > On an up-to-date regular Android phone, a normal app is already sandboxed from other apps’ private storage It could be that my Android phone (Android 8) is outdated, so something weird happened? I have a banking app on my phone that I don’t connect it to any other app or social media, the bank account logged in on this app is not even in my name. But when I open my Facebook account and check the “Your activity off Meta technologies” in the Your information and permissions tab of the account center, I see that banking app listed there saying that “29 interactions were shared with us”. And I have no idea how to stop that. Could it be that they are communicating with each other via Intents, Content Providers, and such mechanisms (sorry I don’t know enough technical things about Android)? Is it possible to block that kind of communication?