Hey @user10864, welcome to our friendly Community! 
I have to admit that, unfortunately, our widgets are not fully ADA-compliant and don’t have such an integrated feature.
However, you can customize the widgets to make them more accessible for screen readers. Our developers will also be happy to adjust the widgets according to your requirements if it’s possible. So could you please advise what you’d like to change in the widget (i.e. alt text, bigger size of the elements, etc.)? 
This being said, we already have such a request on our Wishlist. Please vote for this feature to get a notification upon its release here - Make all your widgets Ada compliant.