The woman who is deaf blind uses a refreshable braille keyboard. I looked up the cost and it's ~$3000USD. Even if some nonprofit organization pays for this, you still need parents and caregivers that know to take advantage of this.
I have no hardware experience, but I think I may take on the task of making life easier for some people with disabilities.
Quick ideas that popped to mind while watching the user stories: 1. Using AI to transcribe videos for people to have a standalone captions source other than their video player. 2. Several of the users use the tab key to fill out forms. Hell, Google search is nigh-impossible to use as keyboard only; Good luck with smaller sites. Some sort of open source project for handling tabbing logically would be awesome. Maybe a chrome extension that lets devs interface with it a la sponsorblock. 3. I'm fascinated by refreshable braille now. It's expensive because the technology seems pretty niche. I'm very uneducated on this topic but it feels like a cruder technology would also work, at the cost of size or throughput. There also don't seem to be any phones/portables with this capability.
I'd love to get into something like this, but don't know how. If you are in this sort of space, I'd love to talk.