Room scanning or rescan/remap on Quest 3 Unity

I'm trying to figure out how to do the room scanning on Quest 3 (like in the demo app "first encounter", not the basic plane detection that sets up walls from your room setup). 

Remap button or something, Phonto also has this feature, but I don't know how it works. While the apk is opening, it asks if you want to scan it the room.