Real unfortunate news for GrapheneOS users as Revolut has decided to ban the use of 'non-google' approved OSes. This is currently being posted about and updated by GrahpeneOS over at Bluesky for those who want to follow it more closely.
Edit: had to change the title, originally it said Uber too but I cannot find back to the source of ether that's true or not..
If you only use Android, go with Aegis. For a end-to-end encrypted, cloud-synced (also self-hostable) solution, check out Ente Auth. It also works on desktop.
Oh, I was using Keepass2Android as a password vault, but was a little frustrated with it because occasionally it'll forget to synchronize with the file before adding an entry and leave a "conflicted copy" I have to deal with manually. If KeepassDX will also do TOTPs that sounds perfect.