No Face option in Android 10 with Xiaomi

[andreszs]

Hi, the sample code is great, I've tested it with these results:

• Android 11 on Samsung with face+fingerprint enrolled: User can select either unlock method and both work OK!
• Android 10 on Redmi 9 with face+fingerprint enrolled: Only fingerprint method is shown
• Android 10 on Redmi 9 with face enrolled: Only pattern method is shown

In short, it seems Xiaomi somehow managed to hide the face unlock from the Biometrics API, meaning it cannot be used. I'm wondering if there's any workaround for this, and if any other vendors are also keeping this feature private and not exposing it to the API like they should.