in the early 2000s when fingerprint readers started getting popular, my coworker and I decided to test them...

super glue fumes, printer toner and scotch tape. that's all that was ever needed to bypass the reader once you could isolate a good spot where someones finger left a good mark. like from drinking glass or a door knob

I'm not sure if I'd ever trust a fingerprint to fully be a secure passkey

Fingerprint readers don’t store a raw copy of your fingerprint, to use a bad analogy: it’s like a biometric hash.

That's the thing - it's not possible. The fingerprint is only ever stored within the fingerprint module, with no method for retrieval. The only thing the phone sees is "did this person scan a matching fingerprint or not?"