No I would not dare touch any of the things in my project folder, and I also just reloaded up the project to try and see if the Megascans folder has any use, but then I found that every object was back, then I tried pressing G to go in game view (where all visible volumes hide and motion blur enables), which is when 90% of them disappeared again and it looked the same as on the previous screenshot. Then I pressed G again, it was all back.
I quit the editor and it actually asked me if I want to save as if I had made some changes, even though I haven’t, so I feel like it got back in place. I’ll reload the editor now to make sure it’s alright.