Server Version#: 1.40.3.8555 (running on LinuxMint 21.3)
Player Version#: 1.97.2.190-ca5000d0 (Plex for Linux, running on LinuxMint 21.3)
I scale up my UI to better see the display at a distance; i.e., the “10-foot interface”. This works fine running the web player – the UI components and the mouse cursor scale appropriately.
However, running the desktop player, it does not scale the mouse cursor. With the display scaled (to 200% or 300%), and then running the desktop player, you can watch the mouse change from large on everything else and then shrink to a minute size when the mouse runs over the desktop player window.