I've been evaluating truly native x-platform GUI frameworks for a while and GPUI[0] from the zed team along with longbridge/gpui-component[1] looks the most promising.

Though I haven't tested it too much other than building small personal tools like a work habit tracker, it's very well documented and looks great. Gave me a good excuse to try the language again as well.

[0]: https://www.gpui.rs/

[1]: https://longbridge.github.io/gpui-component/