> …Controlled by Apple and Google.

FFS ! Pure FUD and you know it.

I don't know about Google, but with Apple, the data necessary to validate the fingerprint is stored on the device's secure enclave[1].

Its not readable by apps on the device, let alone Apple !

(I imagine Google devices are the same, I just said "don't know" because I don't have the first-hand knowldege).

[1] https://support.apple.com/en-us/HT204587