If one can’t use a keyboard, maybe the laptop form factor is not the right one to choose.
I'm not who you are replying to, but as someone with a condition that leads to dry, cracked skin on my fingertips, it's not that I can't use a keyboard, it's that fingerprint scanning doesn't work for me. Thankfully it's not the only way to unlock a MBP.
This is going to sound awfully like shilling. But I’m a large fan of the “unlock with Apple Watch” feature of the Mac; and I’ve tried to reverse engineer it for Linux.
Look into KDE Connect which has a similar feature. Not proximity based as far as I know, but it handles the hard part of unlocking the device.
My problem with it is it only works 75% of the time. Another 15% of the time it just hangs indefinitely. And 10% it just doesn't even try.