You keep saying this but I don't know of anyone that thinks that scientific models ARE the universe. They think they accurately describe the universe but no one thinks they ARE the universe. So what do you really mean by this?
The entire "god of the gaps" falasy, presumes that because the universe itself is increasingly "known" by science, there is less and less place in it for a God to hide in it. But that very premise is a misunderstanding.
We don't know and more importanlty cannot know what the universe IS, eg how many dimensions it has, we can only model what it usually does in as far as phenomena that repeat, within our limited senses , which is projection of a reality into our sensor space.
An ardent evolutionist will tell you develop only as far as is needed to get a survival advantage. So we cannot sense it all, or the beings in it, or perhaps even most of it.
We cannot be certain that what it usually does, is what it always does. Or whether we share it with things and beings we cannot sense most of the time. The creature that lives in the dark, does not have eyes. If humans are not a threat to it, it has no need to develop senses.
Kant rationalises this, as the "noumena" the underlying reality, and the "phenomena" of how we perceive them. Plato postulated a shadow world, and that our sense of the universe was a mere shadow of a reality.
Science is a marvellous tool. But that is all.
Kids grow up thinking science explains the actual universe. Not our perception of it. The two are radically different.