Not necessarily, the idea of the multiverse isn't only a change in natural laws, it's a change in variables.

In one universe everything can be the same save for an atom bouncing left or right.

Or it could be one in which atoms don't exist.

The trouble is that we currently have no way of observing those different possibilities to know if they can exist or not, not to mention if observing them will change them in any way like in quantum physics.