What have you already tried:
I checked the SEO settings and apart from adding alt names for the images I didn’t do anything else.
Additional information:
[Include any other pertinent details or information that might be helpful for people to know when trying to answer your question.]
When you set an SEO meta description, it’s simply a recommendation to search engines that “this is what we’re recommending as the meta description”. Google can (and does) use different descriptions based on the text in your site if it’s a better reflection of the site and search.
Things to check (if you haven’t already)a:
Updating image alt text
Updating SEO meta description
Since this isn’t an instant change, and sometimes takes time for Google to recrawl sites etc., you may not see this updated immediately