Change banks! It's a very easy thing to do to get a new bank account and move your funds over.
Or use the web version instead of the app.
Or use the web version instead of the app.
If so you can get a Yubikey and use Yubikey authenticator on a LineageOS device and it will work fine with all of those services. It follows the same standard as Google Authenticator and is a drop-in replacement.
I will install LineageOS once I need apps that my old phone no longer supports. I ordered the MitID backup key generator in case their app doesn't work, but I'd prefer not to need to carry it.
1. https://www.reddit.com/r/sweden/comments/ocd6v0/bankid_med_l...