>That sort of design has fallen out of favor with newer frameworks, unfortunately. The new preferred style seems to be a wireframe that the dev chooses which parts fill in, and often only the barest of essentials makes the cut.
Which ones, besides web frameworks pretending to be desktop ones? Most if not all frameworks I know support keyboard navigation.
I know of at least 5 different UI frameworks in different languages which are partially accessible or completely inaccessible. Some include Dlangui, Tkinter (although this is getting better), DearImGui... Really any UI that decides to draw it's widgets by frame. QT also has some accessibility problems. In apps made with any of these, they are either impossible to use with assistive technology (and therefore the keyboard) or they are very difficult to use.
Dlangui is so niche that I am amazed to even see it here. DearImGui is intended for thowing together some slap-dash UI widgets for debugging things like interactive rendering.
Do Qt built-in widgets have huge problems? Inwould assume that custom widgets invariably do because approximately nobody writes any accessibility handling for them.