https://wccftech.com/apple-releases-ios-15-1-tvos-15-1-and-watchos-8-1-beta-2-to-developers/

Today, Apple has seen fit to release iOS 15.1, iPadOS 15.1, watchOS 8.1, and tvOS 15.1 beta 2 to developers for testing purposes. The new beta builds arrive a week after the company seeded the first beta to developers. The new beta builds will bring new additions to the table and feature bug fixes for enhanced stability of the devices. Scroll down to read more details on the new beta builds.

If you are up for it, the new iOS 15.1 and iPadOS 15.1 beta can be installed on your iPhone and iPad through the Apple Developer Center. Make sure that you have installed the proper configuration profile on your compatible device. iOS 15.1 will bring support for FaceTime SharePlay, something which was missed in the initial release of iOS 15. The new build will also bring Lossless Audio and Dolby Atmos with Spatial Audio support to the HomePod and HomePod mini. Lastly, support for SMART Health Cards will also be part of the mix.