That's part of the problem. Some projects, when they move to diataxis, will create a top level section called "reference" and have a single item under it called "API" (or similar.)

Depending on the docs theme, it can require clicking through to get to it.

It is a minor annoyance.

edit: Also gonna tack onto this that my original comment reads way more acerbic than I actually feel. I was sleepy and didn't proofread for tone like I normally do.