Don’t know about missing, sorry. The problem is more that some games that use cutting-edge features might have really bad performance, since there’s been no priority on optimising it yet. The last game I played that was that troublesome was Horizon Zero Dawn - was almost unplayable on Linux at launch; couple of updates later, equally as good as Windows.
Never tried raytracing, would imagine that would probably have some issues. But I hear that even at best, RT is a horrific performance hog.