Yew is writing Rust to create html. Same as Java Thymeleaf. Here's the problem - Java developers are bad at UI. And good UI designers/developers think in HTML. I am not pro or anti this situation...im just talking about the reality.
The tooling is also around html. Figma-to-HTML is the most effective way to have your design cycle work.
This is where HTMX shines. HTMX is just HTML++. It is is not Rust or Java. Which means your design cycles will continue to work.