I'm a designer who used to be a React developer (2 years out of the game though). I don't have a strong opinion about the engineer's choice for how to implement my designs, but if this makes their lives easier and gives us a little extra time to make improvements, I'm all for it.

Call me skeptical, but I wonder how useful it would be for the FE devs on my team. In the past, I've never had a great experience with code generators, I've usually ended up ripping out the results and redoing it myself. Sometimes there's an unexpected limitation ("oh yeah, we use tailwind, this is useless to us!"), or a bug, or sometimes it just doesn't produce something I would stand by.

I'm also a little scared of showing this to other designers, or project managers, because I'd be worried about it setting unrealistic expectations. "Great, there's the front-end problem solved, guess you developers can do about twice as much work in a day now, right?"