Maybe I'm blind, but the only "docs" I have found are these (MCForce ReadTheDocs).
Normally, when I think of an API documentation, what I have in mind is something that outlines the main classes and methods provided, and if I'm lucky, even a quick description of what they do.
I am new to modding Minecraft, but I find it odd that I have to go through YouTube tutorials to get examples on how to do pretty much anything, specially when I've gotten to using DataGenerators and most of them just write the JSONs by hand (I'd ask WHY, but the answer is lack of proper documentation, at least as far as I'm aware).
If such a documentation exists, I'd be very thankful to be pointed to it. Even better if it covers the 1.17 version of the API.
P.S.: Is there something similar for the "net.minecraft" packages?