How to always allow TouchID to unlock MacBook

Apple's iOS secure enclave is almost certainly the "flavor of TPM" that is built into the MacBook Pro. I would say it's a very, very long shot that it would be exposed to BootCamp or other virtualization apps, but there is of course hope when you have API for third party apps to get at the fingerprint sensor from macOS.

You are correct that this is the first time Apple has included this hardware on the Mac so maybe some time in the future you can expect the functionality you rightly desire. For now, I'd plan on yubikey or manual password entry.

One option it to alternate fingers back and forth while registering them. ie. place your right index one press, then right middle one press, then right index again for one press, etc... Do that the same when you get to the edges. You'll be able to unlock using either finger stored in a single memory location.

I currently use this, it does work, I've heard of people registering several finger prints to a single location on iOS. I'd rather register them discretely though, hence why I asked this question.

I suspect it's accuracy goes down as the number of finger prints goes up, but I haven't seen that with just two prints on one memory slot.