Avatar Animation static object spawning

how do you have a avatar spawn a object that lets you walk arround it but it does not move even using ingame movement for example https://youtu.be/RoKSI1aETf8?t=470 how moon can move and the spawnable room doesnt move

Sounds like you want a world fixed object, this prefab has a download and tutorial on how to set it up. You can replace the cube with whatever object you’d like to be fixed to the world.