Well, you are not alone to have looked for this feature.
If thats exactly what you are after, let me help you bring this hidden feature into action.
Hence, so long as your iDevice is running iOS 12 or later.
you’re able to take advantage of this feature.
Yeah, you read that right!
That all being said, its time to run through the quick steps!
1.On your iPhone, launch theSettingsapp.
2.Now, selectScreen Time.
3.If you have not yet enabled Screen Time, confirm to turn on the toggle to proceed.
4.Scroll down a bit and chooseContent & Privacy Restrictions.
5.Ensure that the toggle forContent & Privacy Restrictionsis turned on.
6.After that, scroll down to theAllow Changessection and tap onPasscode Changes.
7.When prompted, be sure toenter your Screen Time passcode.
8.On the next screen, chooseDont Allowand you are all set.
So, you shouldnt be surprised to see the Face ID/Touch ID & Passcode missing from the prefs menu.