Imagine multiverse theory like this: there's a parallel universe just like this one in the same space and there is an infinity of these. And that's just how you would describe a geometric point, a singularity. Then it doesn't make any difference that there are an infinity of different variations in the near vicinity, so to speak, in different dimension. They just don't interact, the point stays a point. A fix-point, so to speak, and the metaverse is the Y-Combinator https://en.wikipedia.org/wiki/Kleene%27s_recursion_theorem