I don't think so. While there are some scenarios that are better coded (where lots of different paths open up quickly, typically Excel-like), in many cases good designers are incredibly fast with Figma and I know no coder who can be that fast.

Also, they spend their time analyzing the problems and have many other things to hold in their head beside coding. It would be very challenging nowadays to both be a great UX designer and be current with the latest CSS evolutions.

That said, I wish more designers would try coding at some point and learn how a browser and website work to get a deeper understanding of the material they design for.

Also developers should understand the designers methods like journey maps, basic typography and layouting principles.