Apple is releasing Beta 2 today (build 19E5219e) of iOS 15.4 for iPhone and iPadOS 15.4 for iPad. It arrives a little less than two weeks after the first version. Apple is currently offering it to developers, public testers will have it soon.
A beta 2 for iOS 15.4
The first beta of iOS 15.4 was an opportunity to have several new features. There are two in particular that stand out. The first is the ability to use Face ID while wearing a mask. The second is the arrival of Universal Control. We can also mention the arrival of 37 new Emojis and full support for the 120 Hz display with third-party applications.
There is currently no information regarding the new features to be found with the new version offered today by Apple. To see if there will be new features or if Apple has simply taken care of fixing bugs and improving performance.
If your device is configured with the developer profile, go to Settings > General > Software Update. You can start the download for beta 2 of iOS 15.4 and then install immediately.
In addition, Apple offers the second beta for macOS 12.3 (build 21E5206e), tvOS 15.4 (build 19L5419e) and watchOS 8.5 (build 19T5223e). Again, Apple does not say what the changes are from the first beta.