Right now, I can play on Xbox X in PT.
Marketplace also available and functioning with Xbox X.
By the moment where I could load offline the FS2020 in Xbox X I could use for the very first time my keyboard together with mouse. 
Now(!), that I am online back again we are back to the old mood. 
You have to unplug AGAIN the keyboard to make the mouse working. 
This is a hopeless situation.
Now also the fix is apparently that you cannot go anymore offline, is grayed out. This is very new to me now. 
Introduction screens changed also 2024 stylish.