https://techcrunch.com/2022/03/14/mask-unlock-is-finally-live-on-iphone-as-ios-15-4-arrives/

Just under a week after Apple’s big event, the company dropped the latest version of a trio of operating systems. iOS/iPadOS 15.4 and macOS 12.3 are now live. For those who don’t live on the beta testing circuit, that means a bunch of key features, including using Face ID with a mask unlock and Universal Control, which offers even more seamless integration between an iPad and Mac.

The operating systems arrive ahead of the new iPhone SE and Mac Studio – one of which we just reviewed. The whole mask unlock thing has been a pretty big bugbear for the past, oh, two years or so. Apple offered a nice stopgap solution in the form of unlocking with the Apple Watch, but this new version makes things more accessible to more users (though, again, you can always stick to the thumb with the SE).