Interesting. Does this mean that it is using a lower level of Play Integrity API checking (ie not hardware attestation), or are they using the open hardware attestation API (which... exists but is almost never used)?

https://grapheneos.org/articles/attestation-compatibility-gu...

I have no idea, but I've never gotten the "this app is using Play Integrity" warning with BankID so maybe it doesn't use Play Integrity?