Came across this article. It looks like Airplay is getting spatial audio support but they haven't mentioned anything about lossless but I presume that they will include lossless as they need to support 16/48 or 24/48? with 768 Kbps to transmit atmos
If @WiiM Support can implement support for Spatial in WIIM Pro Plus or Ultra then we can get atmos downmixed to 2.0 through airplay
Spatial audio via AirPlay could be huge for Dolby Atmos | Digital Trends
Apple quietly announced that its AirPlay streaming protocol is about to get a big new upgrade.
www.digitaltrends.com
If @WiiM Support can implement support for Spatial in WIIM Pro Plus or Ultra then we can get atmos downmixed to 2.0 through airplay