iOS has a Tips app which shows you stuff like this. Not quite a man page but the closest thing Apple is going to give users.

You can download manuals for most Apple products in the Apple Books store.

Good point, I actually forgot these existed. I guess they could be a bit more prominent.

I never even knew they existed until now. So much for so-called discoverability...

Don’t know how discoverable this would qualify it as, been a while since I setup an Apple product from new, but the Tips app does point people in the direction of it. Under the Essentials section of my phone, the HomePod section too if you’ve got one—I remember being pointed at it during setup—probably more if I went digging. Mac OS X’s Help pages ain’t too bad either when I last looked at them a year or so ago, and the Help menu is in every single application, not useful in all of them kind you, but at least the First party stuff it is.

There’s not been zero effort, but it isn’t completely in your face. That said when I reviewed the help pages, pointed a new Mac user at them and told her to go nuts, she refused to look and forgot that menu was there after a while. How do you solve that? People are either curious or they aren’t, but everything a new user needs is pretty much in there if they’re inclined to learn.