https://wccftech.com/latest-apple-music-ad-highlights-spatial-audio-in-stereo-video/

It's stereo, but it is really, really good stereo. Good enough to give you an idea what you can expect from Dolby Atmos in Apple Music.

Right after WWDC 2021, Apple flipped the switch and enabled Spatial Audio / Dolby Atmos support in Apple Music. You must have iOS 14.6 / iPadOS 14.6 installed and subscribed to Apple Music in order to experience this goodness.