Update. Managed to get it working fine. I think this is the same OP asking in reddit too.
I did something slightly different. Instead of installing app, I used next nextdns. You'll need to reinstall and re register the bank app so that the warning message stops coming up everytime you close the...
Starling works fine for me on Mi 11 Miui 14.0.8.0.
I've always upgraded. So it's been registered since Miui 13. Hope it's not something that now won't register if I uninstall or format phone
Update if anyone's reading. Continued here...