

All of those are possible. We don’t even know how big the universe actually is, just that it’s larger than we can see or measure. It might be larger than we can ever measure or even calculate. And our current knowledge is based on what we can see.
If the universe is infinite, all sorts of weird ideas come into play. We might not have to find another universe to find an identical version of earth, except everyone has cowboy hats. That earth is probably just very far away.
Maybe we should have an AI that generates proper acronyms.