I am looking for this for days… I found some people do this without Matterport using other softwares. make 3d model bake materials and lights and make some number of 360 panoramas. Put panoramas inside that baked interior and you got it. I would really like to do this in Unreal because everything else is outside unreal so it would be less time consuming than building whole 3d model and make it interactive in UE. Do you have more info on this or some plugin ?