Why do I think that HBO Max pulled a Netflix with their Atmos?Here are the devices that can play Wonder Woman 84 in 4K HDR.
- Amazon Fire TV Stick 4K and Fire TV Cube
- Android TVs, including: AT&T Streaming Box
- Apple TV 4K
- Google Chromecast Ultra
- Chromecast with Google TV (no Atmos audio)
- Roku Ultra 4800x, Roku 4k TVs
- Xfinity X1 (Xi6) and Flex
- https://www.engadget.com/how-to-watch-wonder-woman-1984-in-4k-231252338.html
HBO Max won't play 'Wonder Woman 1984' w/ Dolby Atmos on Chromecast with Google TV
When it debuts on HBO Max on Christmas Day, Wonder Woman 1984 will lack support for Dolby Atmos specifically on Chromecast with Google TV.
9to5google.com
Among the devices where Atmos is not supported include Roku Premiere and Streaming Stick+, Chromecast with Google TV, and Android Tv's.