"Most" seems quite inaccurate. There is a Graphene OS banking app compatibility database [here](https://github.com/PrivSec-dev/banking-apps-compat-report); it is not easy to filter for European banks, but the [incompatible](https://github.com/PrivSec-dev/banking-apps-compat-report/is...) ones are less than 10% of the total [reports](https://github.com/PrivSec-dev/banking-apps-compat-report/is...).