It wasn't meant as dismissive of the project. It's totally fine to write a UI library that has another focus (games, for example). I'm just tired of those projects being suggested as alternatives to native/GTK/Qt in discussions here and elsewhere.

If Iced actually gets cross-platform accessibility support, that's great! Very few projects have that today. More certainly wouldn't hurt. But until it does, you shouldn't base a DE on it.

Edit: The issue you linked to is about RTL support. That's also required, but doesn't touch on a11y.