I also am currently suffering from this issue with the same device. Let me know if you find a fix because I have definitely been looking with nonluck so far.
Hi, I'm sure you are sick of getting these questions but there's so many replies to this thread they're hard to sift through.
Can I update from xiaomi.eu 12.5 stable on my crux to this 13 stable release without formatting data?
Upgraded to 12.5.6 and now there is no fingerprint option in my security settings on my xiaomi mi 9 pro. Fingerprint outline still pops up in apps but doesn't work and stays on screen until screen off. Why? Is this to be expected?