I’m not sure why that’s a question, it’s just a downloaded file. You can even watch it download separately when you enable Apple Intelligence (it’s not tied to OS updates from what I can tell).

Of course I imagine Apple is not going to be the fastest mover in this regard. I’m not even sure they believe the product will be widely impactful anymore and may keep it relegated to a small list of popular use cases like photo touch ups and quick questions to Siri. For me the most useful parts of Apple’s AI don’t even require me to enable Apple Intelligence.