Not sure what are you talking about. I’m using GraphaneOS as a daily driver and my banking apps work perfectly. The only ‘banking’ app that didn’t work is Revolut but I easily found an alternative and switched. The apps for two actual banks I use work without issues. Notifications work fine, no issues at all. I don’t have separate user profile, I have a work profile created with Shelter app. Everything just works. Work profile apps can’t access contacts or files from main profile. Google services are only available in work profile.