I looked into it a few years ago. Eg left thumb locks biometrics and requires pw (thus saving you from this particular law) . Right thumb just unlocks like normal.
Back then it was impossible, because biometrics couldn't differentiate between fingerprints for lord knows which security reason.
No idea if there is a solution for this already, but imo it would be a very important security feature.
I mean... Tell me you are pedantic without telling me you are pedantic...