You're just asking the wrong questions.
You should be asking, how an infinite number of universes identical, to each other and in every way to our universe, how can all these universes exist at the same time and in the same space.
how is it possible that all things that have happened or are yet to happen on the very spot that you are standing/sitting on right now, how is it possible that all those things are happening all on top of each other, yet you are only aware of what you are experiencing right now, here in the present, of this one universe.
Or how can Big Bangs be manufactured one after the other, similar to the way we manufacture jars of peanut butter or cans of soda pop. How can all those big bangs exist simultaneously and continue to self-create for all of a never ending eternity.
How or why can it be.
I'm a Reincarnationist.