Xbox Insider Release Notes – Alpha Skip-Ahead (2308.230315-2000)

"xbox not being able to play dolby atmos"

According to the Latest Alpha skip ahead Insider release notes this is still an issue the engineers are tracking and working on.

This is fixed. See notes at ASA Alpha Insiders release notes and News.xbox

solved?

https://news.xbox.com/en-us/2021/06/23/xbox-insider-release-notes-alpha-skip-ahead-2108-210621-2200/

This is due to a new Store setting where audio for Autoplay videos is off by default. You will need to enable this setting to fix the behavior. Read more at Xbox
Wire. There is a fix for it that has just been released to Xbox Insiders (Skip Ahead ring).

Are you on the Xbox Insider previews? If so, they are changing it for something else. Can't recall offhand but it's in the release notes from a couple weeks back.

EDIT: here's the link: https://news.xbox.com/en-us/2018/06/18/new-preview-alpha-alpha-skip-ahead-1806-system-update-6-18-18...