Accessibility and Alt Text on Slideshow Images

We are trying to get a page to be accessible and would like to have alt-text for each image in the slideshow at the following url. I see where to add text to each image, but tht text shows up in "<div data-alt=" not "alt-text"

It would be great if "alt-text" could be added to the layout and simply display the string that shows in "<div data-alt"

regionalmm.com/

wave.webaim.org/report#/https://regionalmm.com/

Hi
the images have the alt tag
they are generated by javascript so you won't see them in the source code
for now it uses the filename of the image, but if you fill the field "title" for each image, it will be used as alt tag
CEd