I think the wiki is the documentation: https://github.com/yebai/Turing.jl/wiki. It's linked in the upper right corner. I agree that the fact that the three big items on the page are not links is a bit confusing.

Ah, thank you. Apparently dividing my screen vertically made my web browser too narrow, and thus the links disappeared entirely.

Yep, it looks like there's a CSS @media query which completely hides those navigation links on screen sizes < 992px. That's not very useful responsive design.

It really does need a better explanation right on the page. It is ridiculous to link here and require clicking on a hard to find link to get actual information.

Poor communication.