i saw my colleague setup dual user/profile on the N6.
What is cool is that for user profile 1(he register his index finger) so when screen is locked and he scaned his index finger the screen will unlock to user profile 1.
while the phone is in lock screen. he scans his other finger registered to profile #2, the phone unlocks immd in user profile 2. Fastest implementation i have ever seen with just a swipe of finger.
on my vivo x fold 5, i need to unlock screen on user profile #1, pull down notification drawer and press switch to user profile #2.