Just to make you aware currently there is an issue with playing the new Myst 2021 in ultrawidescreen resolutions as when you zoom into the puzzles it cuts off the top and bottom of the screen. Until Cyan patch it you can resolve the issue by doing the following,,,

Edit the engine.ini file located here:

%userprofile%\AppData\Local\Myst\Saved\Config\WindowsNoEditor\engine.ini

Add the following lines:

[/script/engine.localplayer]
AspectRatioAxisConstraint=AspectRatio_MaintainYFOV