1)why is the nature of multiverse the way it is?
2)why is there a multiverse rather than nothing?
Because
one possibility, if a person either believes in god or leave the possibility open, is that god created the universe in such a way as to challenge people to look at the evidence as they understand it and look at The Word and make a choice as to what they will beleive.
We sometimes have to admit that we just don’t know. That is not to say that oen cannot beleive in god or choose not to. But no one can honestly say that they know that there is no god, only that they believe that there is not.