In b4a, we have the accessibility library available. This works to use the setContentDescription that can be read by screen readers. This is cumbersome, and it would be nice to add more options directly to the designer.
This is becoming more important with people threatening and bringing lawsuits against developers for apps not being designed for screen readers (in the US).
It would be nice if the designer would support Content Description and Important For Accessibility. Also, it would be good to add these to be accessible programmatically.