Thanks for the long answer! I already tried to copy the PuzzlePlatform Module to the new Project, but somehow, even after regenerating vs files, it wouldnt show up under C++ classes in the ue editor.
By now i just created new Widgets from the new MainMenu class in the CoopGame Module and then copied the Widget Canvas over to the new Widget. Didnt know u could just copy so much Information over from one Open Editor to another one.
Still i marked your’s as an answer, maybe it helps someone else.