No, there need be no "gap." In fact, that's the essential point of calling it a different "universe." It would like point-for-point within the same space of this universe.
That's nonsense though.
This universe takes up all of the space here. You cannot fit a whole other universe, with all its necessary forces and interactions, in the same space because the very distinction between two different universe would just be gibberish.
It's like holding up an apple and claiming 1400 other apples are in exactly the same space.
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