>>364862490
vrchat has an ancient "home kit" which is a copy of the original default home from 2018:

https://www.youtube.com/watch?v=ynQRg4LhNjE

if you're new to unity and vrchat it's not a bad place to start messing around and learning how the engine makes scenes (worlds) out of meshes, materials and colliders. 

I'm still using it as my home world, but now filled with two and a half years of stuff I gathered.