Apple has introduced a new feature in iOS 15.4 beta version that lets Face ID work with a mask.
Face ID is most accurate when it’s set up for full-face recognition only. To use Face ID while wearing a mask, iPhone can recognize the unique features around the eye area to authenticate. You must be looking at your iPhone to use Face ID while wearing a mask.
Users can toggle the feature ON from the ‘Face ID & Passcode’ page in Settings.
However, this feature is only available on iPhone 12 or newer models. That means that if you have an iPhone X, iPhone XS, or iPhone 11, you’ll need an Apple Watch to unlock your device via Face ID.
It’s unclear why Apple has limited the feature to the iPhone 12 or if this could change in future betas.