Thanks for working on this and posting the results!
What do you think is the next action to take?
There are several posts on this forum as well as on GitHub that talk about accessibility work, needs, audits, etc. It would be good if we could keep the number of issues constant instead of increasing them by starting new topics each time. Otherwise we end up with bits of information in 101 places. So maybe a next step would be to link all of them and/or post on GitHub - jupyter/accessibility: A repository for ongoing work around making Jupyter's software accessible and inclusive which @ellisonbg created but hasn’t seen much action so far. Some of the other topics I could find:
Now that I opened the GitHub repo I see you already posted an exact copy of your post there as well. Where do you want to discuss this? In my experience posting in more than one places leads to split brain syndrome :-/