I ported the leptos rust web framework to run on native platforms. Currently it works on ios, macos and linux (GTK). Eventually want to also add support for windows and TUI as well. It uses taffy for layout - which gives you the same flexbox and grid layout engines that web browsers use. Components are all fully native for the platform, via their corresponding binding crates (objc, gtk4, etc).

UI library is here: https://github.com/josephg/leptos-native

And here's the schedule viewer app I made with it. It runs silky smooth on device: https://github.com/josephg/dweb-sched

The whole project is currently experimental & vibe coded. It's missing a lot of components, and it has bugs. I'm currently rewriting it by hand to do it properly.