It would be nice if helm-descbinds would also show the bindings which a derived mode inherits from its parent mode, perhaps by adding a section for that mode directly above or below the derived mode's section.
I'm so sorry, the parent mode's bindings appear to be already merged into the derived mode's section, it just happens that in my case the parent mode had just a single binding which I overlooked.
Closing.
It would be nice if
helm-descbinds
would also show the bindings which a derived mode inherits from its parent mode, perhaps by adding a section for that mode directly above or below the derived mode's section.