https://wccftech.com/download-beta-2-of-ios-15-4-ipados-15-4-released/

Apple has released the second beta of iOS 15.4 and iPadOS 15.4 with new Face ID features for iPhone.

It is highly likely that Apple is going to release the full and final version of its software at its rumored March event, where the company is expected to make some Mac and iPad related announcements. Today though, the company has released beta 2 of iOS 15.4 and iPadOS 15.4 for both iPhone and iPad, but only available if you’re a registered developer with Apple.