The Amazon devices. Fire TV stick, Fire TV Cube, Fire Tablets, the echo (Alexa) units. DMP-A6, Wiim Pro Plus. XBox Series X and S. Android phones. Probably the crappy Apple stuff too. (Sorry, I've hated Apple since they tried to sue everyone else over having a rectangular shaped phone and the slide to unlock crap).
Amazon music works well on all of the above. Especially the latest Fire TV Cube. Have mine connected to an Atmos AVR and the Atmos music and "360 surround" music sounds great. The volume is a little low and I really have to crank up the volume on the AVR to equal my normal listening level.
I don't believe Atmos is supported from Amazon music on the DMP-A6 or the Wiim Pro Plus.