In the last year-ish I wrote a pure-Rust windowing and input library for Windows / MacOS.

I never even had to think about making the window controls appear, they were just there by default when I created a window.

If I eventually want to extend support to Wayland / Gnome I need to figure out how to pull in complex UI framework dependencies. Or I could write my own code to render window controls but it won't be a perfect match to the platform's aesthetic. Compared to Windows / MacOS it's a mess.