Yes, this is the exact message I'm greeted with when I tap "Log in" in the Revolut X app:
Sorry, Revolut is not supported on devices with custom firmware
We're serious about keeping your data secure. If you would like to install and use the app, please use a device with official Android firmware
Quite clearly it's using an integrity check to disallow alternate Android operating systems. As a customer, I sincerely frown upon this, so I'm going to forward them my opinions and link them to the attestation guide.