The servers are coming back online, and the patch notes for Hotfix 1.5.3.1 are available below.

https://duneawakening.com/news/dune-awakening-console-release-patch-notes/#1351

This hotfix is available for @Steam, @PS5 and @XBOX

Remember to restart your Steam client if the download does not appear.
If you're playing on single-player, make sure to restart the game to receive the update.