I should've been clearer - by Google-approved, I meant that your device has to pass Google's remote attestation scheme. From https://support.wero-wallet.eu/hc/en-us/articles/25599098295...:

> I’m seeing this error message: "Your device does not meet our security requirements".

> /../ If the operating system is an Android variant (also called a 'custom ROM'), such as LineageOS or Pixel Experience, then the wero app can’t be installed for security reasons.

The thing is, with most banks you aren't even allowed to use the Wero app that has this play integrity restriction. The banks integrate Wero directly into their own apps. So its mostly up to your bank.

It does not say anything about remote attestation, only rooted/unlocked phones. Most likely it works fine if you run GrapheneOS with a locked bootloader.

Many European banking apps work on degoogled Android like GrapheneOS or /e/OS fine, as long as you have locked the bootloader and USB debugging disabled.