huss191998 AFAIK Enscape is already working on integration, D5 guys are very well instructed on how to proceed and we are in direct touch so I guess they will integrate when they will be ready (as D5 for Rhino have still Beta/WIP status). Regarding Twinmotion it is impossible at this point in time as it does not support instancing (this is official info from Epic), however, you can use UE Datasmith Exporter as RN will append its data to *.udatasmith file and you'll get RN result as expected in UE Editor.
Besides that, you must also understand that integration isn't part of the RN's responsibility. RN exposes data to anyone and every other developer can pick this for further use. Every company owns their plugin source code and it's obvious I don't have any impact on their product these decisions are up to them not me.
