Website guide error for diacritics?

in, you get these instructions.

At the bottom of the list, you will find a range of glyph names ending in comb. That is short for combining, which makes sense because we do want to combine them with base letters below them.
Select them all, press Generate and you’ll get nine marks. If everything went right, you should see acutecomb, cedillacomb, circumflexcomb, dieresiscomb, dotaccentcomb, gravecomb, ringcomb, strokeshortcomb, slashlongcomb, tildecomb:

Except the image description tells a different story, you only get the legacy marks automatically, and that’s what I’m finding too.

Since this change, I’ve been making these glyphs/characters manually, but I’m curious if I’m doing something wrong or if there’s something missing?

The combining marks are in the Latin subgroups that need them. E.g you get dieresiscomb from Latin > Western Europe.

It’s on my list.