Hmm, I did some more testing and unfortunately, there are still some stuff left to do. It does not seem to work correctly for geometry nodes that have been created before 4.0; it just shows nothing and gives a bunch of errors.
I am currently working on a solution. Hopefully I will find a fix , then I will upload it: modifier list for 4.0 with geometry node support. 
Edit, I think its fixed! not a clean solution, but it works on evrthing I have tested so far, time to do some more cleanup, then I will release it