Also requesting this. I’m aware of some workaround methods but the problem is these really don’t hold up well in third person. Making a proper Portal Actor would involve certain core changes to how traces and lerps functioned (otherwise things like walking through a portal with active camera lag would be ludicrous-looking) as well as how lighting is baked, which can’t be realistically achieved without the work of Epic themselves… but it would be ENORMOUSLY useful to me.
I feel like a lot of people nowadays see requests for this kind of functionality as a play at making Portal clones, but the advantages to level designers are pretty diverse; looping maps, ease of fitting interior spaces into exterior buildings, etc.