2FA is a requirement in Europe. I can't log into my bank account without my phone being able to run the app.

But 2FA is moot if it’s the same device as your bank app, is it not?

Yes. Please tell my bank that.

They know. The EU directive is quite clear that hw tokens are to be preferred over phones. Banks are cheap though and violate it.

It is in the specific case that you don't have biometric or PIN login set up on the device and you use a password manager that doesn't require authentication. In that case, the only factor is "something you have". Otherwise, it is still a multi-factor authentication because the device itself still represents "something you have", and your device unlock represents "something you know" or "something you are".

I would stop using bank requiring phone app to do banking, simple as that, both my main EU accounts use sms verification codes and extra password, which is fine with me. If they will require an app, they will lose customer.

2FA and Google SafetyNet are two completely different things. Your banking app can implement 2FA without SafetyNet.