I'm on Xbox one and since todays update (2/3/21) all my Class 66 livery designs are still showing up in the livery editor on both East coastway and Southeastern High Speed but not available in Timetable mode . As for my class 483 don't get me started. Been unavailable to use on the IoW since release day . I thought updates were meant to make things better.....not worse !!
This is something we are aware of gibsonaj1 We will update this thread when we have more updates. https://forums.dovetailgames.com/threads/custom-livery-issue-3rd-march.36384/
