Converting figma layouts to code is fairly trivial. Converting it to code that's usable is a whole other story. There's the actual design related concerns such as nested layouts and dynamic behavior, as well as code base management concerns.
At best this is a possibility for some tools like webflow, or framer. With figma, there's no chance given how they would have to re-implement to get actual feature-parity with actual target platforms.
Disclaimer: I am in this space and basically building what we're talking about. All these people saying that this is the future of figma are out of their goddamned minds. Figma already has css exports, and maybe they'll get design tokens. More than that? It would be a completely different product and kind of insane to try. The focus and clarity that figma has is underrated. People think that just because it's all about web dev, these are all the same tools, but they're not.