Apple’s newest HomePod beta, issued alongside the iOS and iPadOS 15.1 betas on Tuesday, brings back lossless audio and Dolby Atmos support. Both features can be enabled from inside the Home app, but only if you have an invite.
Apple has been working to bring its newest audio features to HomePod speakers for a while now. It first began testing them shortly after WWDC 2021 in June when the third HomePod 15 beta was made available to testers.