Which begs the question of why, if something is impossible in one finite universe, shouldn't it be impossible in whatever number of finite universes you want to posit. Infinity times zero is still zero.
But it's no matter. Multiverse theory is just another example of what happens when you reason outward from mathematical equations instead of travelling in the opposite direction - you end up with a bunch of unsubstantiatable nonsense that ought to be good for at least a couple of pop science books.
No, while in each finite universe you have a limited number of random chances to create life. And the probabilities of it happening in a single universe are ridiculously small, (not zero.) But, if you have an infinite number of universes to try again, your probability will equal 1. It will happen given enough tries. Which is what obviously happened since we exist and God does not. /s