I am also having this issue. I notice that if I go to the product pages and preview the products, they show up fine. I am not able to generate “product pages” on my theme page editor, and I’m wondering if that has to do with anything?
The only products that show up on my store are the default preview ones from the theme. I’m using Dawn 15.2.0 (just updated it), My collections were prepared on my store and appear on the theme editor, but do not post the products despite being successfully listed when customizing the theme.
I’ve tried your suggestions with no success.