Unfortunately, Revolut has banned GrapheneOS users from logging into the app because of an incorrectly implemented device integrity check based on the anti-competitive Play Integrity API. Our users need to put pressure on apps like this to get them to whitelist GrapheneOS.
How you can help solve it:
1) Open a support request explaining they've incorrectly banned a secure operating system with a link to https://grapheneos.org/articles/attestation-compatibility-guide with how to fix it.
2) Contact their management on LinkedIn and other platforms with the same thing.
3) Play Store review.