If your pitch is “X but accessible” you’re building features. That’s cool, but maybe you don’t need to build the X part.
Use an API to get the information from the less accessible places, provide an alternative UI that is easy to use. Help to make the content accessible where people go now instead of making a third place “for people with accessibility needs”.
To make “X but accessible” succeed, you need to be the best “X” compared existing solutions, which is almost impossible. Zoom did it.