That the fingerprint reader doesn't work is a feature, not a bug. Fingerprints are the worst passwords, as they are easily obtained/faked and cannot be changed.
This tendency to embed biometric sensors in consumer devices is hurting users and hurting security. Only cops and psychopaths find any sort of advantage in that.
It's not required on A-series devices (A1, A2, A2-Lite, A3). But the latest device in that line is the Mi A3 from mid-2019, and there's no official news of further releases so far.
Kind of a big deal. Do you still need to apply to unlock your own device and hope they let you?