Where can the home page template be in Simpla?

Question

CMS

In general, this is the question. Apparently quite an old site got for revision. Logically, the main page should be in main.tpl, but it's not. I can’t understand at all where the content on the main page comes from, I looked around all the templates that are there, but there is no such content anywhere. In the admin panel in the content, it is also not there. What can be here? The template may be redefined somewhere, but where, and where can the template be, if not in shop/design/ST-Blue_2_filter/html?