Comment by nextaccountic

The trouble is that banking apps will not work if you degoogle your phone. GrapheneOS was an attempt to make this sort of thing work, in a phone OS more secure than stock Android

But to be honest, many banking apps randomly stop working with GrapheneOS anyway. So if you see this...

https://privsec.dev/posts/android/banking-applications-compa...

https://github.com/PrivSec-dev/banking-apps-compat-report

And check the issues, it's unpredictable whether a bank will continue to work with GrapheneOS

So.. if you accept GrapheneOS might not be reliable for this use case, and decide have two phones (one just for banking stuff, another for.. using), then degoogling is fine.

Only thing is that the banking device probably needs to be a phone (or tablet I guess), I don't think you can emulate a real device good enough for it to work on something like Waydroid