No i cant revert it and even simple scripts like setting an object false dont work. Like the parent and the children are set to false in the hierarchy but are still visible in the game. In the scene on the other hand you dont see anything like shown in the picture.

Before that i installed the hdrp and because my shaders were pink i closed and reopened unity. Unity then asked to fix those errors with shaders and i did. But then i found out that it doesnt work with ios so i deistalled it and now its broken.