Windows 11 is about to gain a feature that should have shipped years ago. But, better late than never, right? PCs will soon support using the same camera within ... the Windows Hello user experience.

Then, go to Accounts > Sign-in options. Choose the Facial recognition (Windows Hello) option and use your infrared camera to set things up. For your information, you can use an external infrared ...

Here, find the option called Sign in with an external camera or fingerprint reader. Finally, toggle the corresponding button to turn it ON. Read: Windows Hello Facial Recognition setup not working.