I think I see now what you mean. I guess it just comes down to semantics then. I would say that, by definition (but I'm not sure if this is the most common def

I think I see now what you mean. I guess it just comes down to semantics then. I would say that, by definition (but I'm not sure if this is the most common definition), anything that can act upon the universe is part of it. Your God/simulator/... might be alien to us, but by definition it is part of our universe, and it's just us that do not entirely understand the capabilities of the universe.