https://techcrunch.com/2021/06/08/apple-music-launches-spatial-audio-and-lossless-audio-adds-spatial-audio-playlists/

Last month, Apple announced it would soon add lossless audio streaming and Spatial Audio with support for Dolby Atmos to its Apple Music subscription at no extra charge. That upgrade has now gone live, Apple announced this morning — though many noticed the additions actually rolled out yesterday, following the WWDC keynote.

The entire Apple Music catalog of 75+ million songs will support lossless audio.