On my Huawei P10 lite, my fingerprint has not been in my settings for a few months, it's just gone and I can't save my finger or unlock my phone with my fingerprint.
Then unlock it with your pin and retype your fingerprint, where is the problem?
Did you update recently?
This problem was already a few months ago.
https://www.android-hilfe.de/...77230.html
You may find solutions here.
How old is your Huawei? Maybe the warranty still applies, otherwise you can sometimes turn to the support.
Deutschland.Hotline
800 7788 6633
Monday to Sunday from 0 to 24 clock reachable
German English
"[…] and I can't save my finger […]"
Save data Factory setting
The problem is that the fingerprint is no longer in the settings, the function is simply no longer available.
I already did that, so completely rested the phone
Then hardware is broken. Warranty.