Devhelp doesn't have documentation by default
The problem is devhelp is not usable out of the box. I bet currently what most users do:
- Install Devhelp
- Open it and find out that there are no docs
- Open software center and read description
- Description didn't help. Search
gtk4 docs devhelp
in internet - Find Ebassi's explanation in Discourse.
- Install
org.gnome.Sdk.Docs
My suggestion is to automatically install org.gnome.Sdk.Docs
runtime or at least add a note about this runtime to description in software center.