Like a tiny down triangle in the corner? This stuff is super not hard. You just have to give a shit.
Lots of people can’t tell the difference between something looking awesome and working well.
That's also what I suggested in my answer to onion2k below. I agree, it's not hard. But it does require their design team to overcome some instinctive minimalism.
Common phrases heard on Linux Desktop software issue trackers and forums:
"Why would you want that?" "You don't want to do that, do it <the way I do it>." "Works on my machine." "PRs are welcome." "We've rejected your PR because there isn't any demand for this."
This is the community that thinks .desktop files are a good idea and largely uses the GUI as a really fancy tmux. They're hopeless.