So it seems that we are getting very conflicting replies from Revolut's CSRs. stfn received a clear reply that said that GrapheneOS users will soon be able to use the app again, others' feedback are still being forwarded to the development team, while others' feedback are simply dismissed and are told it's not going to be supported/allowed. So there's a chance that one of the the next releases of the app will allow GrapheneOS, but since we don't know for sure let's keep pressing the issue regardless.
cdflasdkesalkjfkdfkjsdajfd Now, I can't login into the app even when 10.54
At the end of the login process the app says "update to last version to continue" then no login
Predictably, this would happen, but I'm a bit surprised they banned the older release so quickly.