https://wccftech.com/the-witcher-3-xbox-one-x-hdr-displays/

We’ve reported a few days ago that The Witcher 3 Xbox One X update could be really close to release, given that its status was changed from “In Development” to “Coming Soon” on Microsoft’s official list of enhanced games.

The list has been updated again now, adding support for High Dynamic Range (HDR) displays in the nearby column.