https://gitlab.archlinux.org/archlinux/neoasknot/-/tree/main... looks like it might be the implementation for the site. The likes of https://whatcanidofor.archlinux.org/coding/Rust do work.
You could alternatively (provided you have JS enabled), go to https://whatcanidofor.archlinux.org/coding/Rust and then click on "Coding" from the navbar (it will load the page using some JS single page trickery).
I disable JavaScript in general for a significantly better experience of the web, and didn’t suspect anything like this since everything else was working perfectly.
Incidentally, I strongly oppose the use of client-side rendering for pages like this (not CSR in all cases, but yes for a site like this). Barring the small matter of this one broken page, the result is fairly uniformly inferior to the no-JavaScript version: it has a heavier footprint, doesn’t work as well (some history interactions are a touch dodgy, no loading throbber, can’t interrupt navigation with Escape, &c.), and feels slower than fresh page loads anyway. It’s foolish, harmful complexity.