The most popular language by far used for writing UI is JavaScript, and the go to framework this day (React) doesn't use that though.
From the various experiments that popped up over the years, it's pretty clear that the React way works pretty well for Rust, but it's also too slow to be desirable for Rust (what's the point of using Rust for UI if you're going to have web-like performance).
And then again, making a half decent UI framework is a gigantic task, there's just not a whole lot of languages with a decent UI story at all, no matter what's the paradigm of the programming language. (And if you want a
language for cross-platform UI, I'd argue that the only one that ticks the box is JS with React in Electron and React Native, and it's not even truly a single framework).
From the various experiments that popped up over the years, it's pretty clear that the React way works pretty well for Rust, but it's also too slow to be desirable for Rust (what's the point of using Rust for UI if you're going to have web-like performance).
And then again, making a half decent UI framework is a gigantic task, there's just not a whole lot of languages with a decent UI story at all, no matter what's the paradigm of the programming language. (And if you want a language for cross-platform UI, I'd argue that the only one that ticks the box is JS with React in Electron and React Native, and it's not even truly a single framework).