It is part of the Windows Hello biometric authentication ... However, if you’ve set up Face Login with a compatible camera and now want to disable it, you can follow some easy steps.

Windows Hello is a biometrics-based technology that enables users to authenticate their identity in order to access their devices, apps, networks, etc using fingerprint, face recognition ...

Even if someone were to capture your fingerprint, face, or PIN ... That’s why you need a Windows Hello-compatible IR camera ...