It will have two USB Type C ports, one on the left and another on the right side of the keyboard. The KLL firmware supports daisy-chaining of keyboards, so it will have the same level of functionality as an ErgoDox does for split keyboards.
This doesn't stop at just powering and sending data through however, we've designed it such that LED animations will actually be able to propagate between linked keyboards. This means that when we design a matching numpad for the K Type, they will be as one.
So, this isn't a hub in the strictest sense, and there is pass through, but probably not in the way you were expecting?
Does this answer your question?