This is cool. I just posted the link on a blind gamers' Discord. I don't do much D&D--really want to change that at some point--but they're frequently complaining about D&D Beyond being an accessibility dumpster fire and looking for something else.
I poked it a bit, and really appreciate that command output is automatically spoken under NVDA. I don't imagine that is accidental. :) Thank you.
Now you have me wondering what web-based command lines I might build. Maybe a crazy idea, but have you thought about adding external command support somehow? Accessible map representation is vastly unexplored, and it'd be fun to build that in the context of initiative.sh somehow. Maybe a web service, or a wasm module if you want to be one of the cool kids.
I could also see this being an embeddable widget in something like a Matrix room. Give everyone a shared context that all their commands can reference, maybe with different permission levels. The context might share all characters with the DM, each character with its own player, a representation of the map which they could move their character on in turn, etc. I've probably just scope creeped the hell out of your project, but this is really neat and I'm intrigued.