One is knowledge the user has, and the other is a physical key they own.

Providing your 'finger' to unlock a device is no different than providing your 'key' to unlock something. So you can be compelled to provide those biometrics.

Compelling you to reveal a password is not some *thing* you have but knowledge you contain. Being compelled to provide that knowledge is no different than being compelled to reveal where you were or what you were doing at some place or time.