Choose What You Can Use Face ID For
Additionally, you can also change the things Face ID can do for you. By default, you can use Face ID to do stuff like make purchases with Apple Pay, download apps, and auto-fill your passwords.
This means that if someone can use your Face ID, they might be able to do all of this without you even knowing about it. To change this, you need to:
- Open the Settings app.
- Scroll down and go to Face ID & Passcode.
- Enter your passcode.
- Under Use Face ID For, at the top, disable all the things you want.