this is a change from the Note5, s6, s7 and note7.. where even if you had tripped knox and have root you could still register your biometrics and use them to login to:
after the addition of samsung pass, we now only have the ability to unlock our device with biometrics. Website access, Samsung account and even some apps like my banking app that previously allowed us to use a fingerprint do not.
this majorly sucks.. as I tripped knox right away and still want to be able to login to websites with a finger touch...
SO while trying to modify the samsung pass apk to be more lenient.. I discovered that if you simply remove samsung pass...
then remove /data/app/com.samsung.android.samsungpass-1
now when you go into the settigns > lock screen > fingerprints > enter pin > Samsung pass is gone, and re-replaced with the original menu items to toggle, websites and samsung account login!! flip the toggles and you are all set to go.
FYI: I had to clear data on my banking app and relogin for it to trigger the change and allow me to register my fingerprint to login