Thank you both - updated accordingly!
EDIT - Neil, I found an old thread of yours which is very relevant - https://intfiction.org/t/notes-on-screen-reader-accessibility/5660/1.
It approaches the issue from the other side - “which development tools are most accessible, and/or produce the most accessible games?”, whereas I approach the issue from “what can I do, as an author, to make sure my game is accessibly and most usable?”. I’m not sure I can fit most of your points into my main post, but our threads complement each other nicely.
I did find a post where you talked about highlighting keywords, and fitted that in. Cheers!