Definitely not a new trick, Apple has had Public Source for decades. I was going to suggest forking it and building it yourself, but there's a proprietary library for the fingerprint reader. 🤔 Maybe Blocks can at least reproduce the build, though I'm not sure how reassuring it would be if there were a 3rd party blob.
This is what you meant ?
https://m.primal.net/JykX.jpg
Yeah, a fork wouldn't be able to build and flash new firmware.
Rekt
Didn't you "test the durability" of one? Maybe the fingerprint reader has a Linux driver.