https://wccftech.com/ios-13-5-makes-it-easy-to-unlock-iphone-when-wearing-a-mask/

Apple has released iOS 13.5 beta 3 with its first version of COVID-19 exposure notification API. The company also included a small but helpful change that makes it quicker for iPhone users with Face ID, to unlock their phones with a passcode.

With the new iOS 13.5 beta, any iPhone with Face ID can automatically detect when the user is wearing a mask, and instantly shows the passcode screen. This makes it easier for users to enter their passcode and unlock the device. All users need to do it to swipe up on the screen and Face ID will open the passcode user interface.