I can't play any Dolby Atmos music (via Apple Music individual plan) in my home AV system.

I have a trial subscription to Apple Music and want to playback Dolby Atmos music through my home AV surround system, that is the primary reason for me to subscribe to Apple Music. My AV system is Dolby Atmos capable as it can currently play Amazon Music Unlimited or Tidal Dolby Atmos music tracks with no problem.

With Apple Music, I've tried to play Dolby Atmos tracks from my iPhone and iPad via AirPlay to my AV Receiver (Denon AVR-X8500HA), and it only plays in PCM, not Dolby Atmos. My AV surround system also has a LG OLED TV attached (i.e., SmartTV), so installed the Apple Music app on the TV and played back music tracks from the SmartTV. Same problem, only plays PCM, not Dolby Atmos. I tried playing Apple Music Dolby Atmos from my Xbox Series X console using the Apple Music app, but it only plays in PCM, not Dolby Atmos.

How can I playback spatial music tracks from Apple Music directly on my home AV system? Do I have to invest another $135 for the Apple TV 4K to do this? Amazon Music Unlimited and Tidal HiFi Plus both can playback Dolby Atmos tracks via their own apps on Amazon Fire TV. Can I do something similar with Apple Music's Dolby Atmos tracks? Thank you.