I used wxWidgets to build a native GUI for Windows + Mac 10+ years ago and implemented all GUI-drawing (it was an audio signal processor control software so included meters, faders, knobs, audio spectrum and I even incorporated Horde3D OpenGL interface for visualising an arena [sadly never fully finished to full potential as my modelling abilities in Blender simply wasn't good enough]). I wrote that, and another guy wrote the network library in C that sent signals to the network devices, and received them. I responded to the incoming network info to draw appropriate parts of the UI like meters/scopes at 50ms minimum.
The fact that we did this as a 1-man team for the GUI and that I can still compile it today (if I had the code) against wxWidgets, to then run on macOS and Windows simply shows the lazy nature of (most/all?) desktop apps by big companies these days.
I utterly detest using them, but it seems customers think an app that takes 5 seconds to launch with a spinning whirly wheel and horizontal gradient animation over list views for 5+ seconds before content is loaded is perfectly acceptable. Quality with a capital K!