It depends if people care about it or not. I never once thought about accessibility in my non-AI authored app. I tried using the screen reader accessibility option and it was unusable.

I prompted Claude to "make my app accessible and usable with a screen reader" and it pretty much did a perfect job making it usable. *

* I'm not a a11y expert so "perfect job" might be an overstatement, but it made the app completely navigable by me using a screen reader.