Hey, thanks!
It's on the unreal marketplace here: https://www.unrealengine.com/marketplace/en-US/product/voronoi-split-screen
I've given a first attempt at getting it working with more than 2 players, but the math has to be quite different for it to work properly, so I would have to come up with a different way to go about it. It doesn't look likely in the near future, sorry.
If you're curious about the math behind the scenes, this web page has some details: https://mattwoelk.github.io/voronoi_split_screen_notes/