I think OP is trying to differentiate between Azure APIs, which are unbelievably slow and horrible, and the UI design itself - the layout, the font, how one scr

I think OP is trying to differentiate between Azure APIs, which are unbelievably slow and horrible, and the UI design itself - the layout, the font, how one screen will flow to another screen, what links to what, how it would be laid out in a tool like Figma. Azure's APIs are atrociously slow. Azure's UI design is pretty nice. There's not much the UI designers can do about their API colleagues.