Can you believe in a god that is not supernatural?

If you mean having a god that teleports between universes, each with their own rule-set that must be obeyed, then I would think the act of teleporting, itself would be a violation of said rules. If you mean that there could be many universes with their own respective rules and a separate god at the heart of each one, bound by its respective rule-set then, maybe? Generally it’s argued that God created the rules, so it’s hard to think about a universe where God exists, is mostly omnipotent but doesn’t author/implement the laws of Physics. This could work in a polytheistic scenario where that deity is subservient to an even higher one.