Product Lightbox Showing Description

Hello,

When you are viewing a single product and you click on it, a lightbox shows up. I believe that it is a PhotoSwipe plugin that is being used. I need to add the description to this lightbox but am unable to figure out how to do it or where it is even located in the theme in the files. Can someone point me in the right direction?

I have attached a photo of the lightbox and the product page I am referring to.

Thank you