Literally just what it says above.
I don’t know if it’s a visual bug or if I’ve accidentally toggled some rendering effect without realising but I opened the project fresh after working on it all day and everything just looked like this.
I gave it some time because I thought maybe it needed to load but nothing changed. I have reopened this project several times now, duplicated the project, restarted my computer and played around with the debug viewports and still nothing has changed.
If it helps, I was trying to download a game when I started the project then instantly remembered that (at least on my device) it could cause issues and closed the project. However i have since paused and fully cancelled the download and the issue is still present.