If it's a Wayland application it will support global shortcuts.
For X11 apps. If you are on KDE there's this menu:

Other DEs have different ways to deal with this.
And if you are on Gnome, change DE. Gnome will always follow its own philosophy, because apparently it doesn't align with yours, you should use something else.
Btw, I gave the same answer in the previous comment.
Also, on the "how can you consider this polished"... Wayland supports global shortcuts, this is a fact. What it doesn't support is "global shortcuts for apps that use a protocol that is not Wayland". I think I made my point