Face ID is a great addition to iPhone and iPad, and it still feels like magic every time it works. But, just like Touch ID before it, you may need to prevent apps from using it. Here’s how to do that.
If you’ve permitted a third-party app to use Face ID as its authentication mechanism, that can be great for making it easier and quicker to sign into anything from your banking app to your shopping list. However, there may be times when you want to revoke that permission. Whatever the reason for your decision, preventing an app from using Face ID requires just a few taps.
Revoking Access Through the Face ID & Passcode Settings
To get started, open the Settings app and then tap “Face ID & Passcode.”
After entering your passcode to gain access, tap “Other Apps.”
Here, you will see a list of every app that has requested access to Face ID, as well as its current state. The toggle to the right of the app’s name denotes whether the app currently has Face ID access or not. Toggle any app for which you wish to revoke access.
Revoke Access Through an App’s Settings
Read the remaining 6 paragraphs
from How-To Geek https://www.howtogeek.com/399535/how-to-revoke-face-id-access-for-apps/
via IFTTT