Hey, @zulubahshee!
From what I understand, please correct me if I’m wrong, what you have on your website is several different shop pages with some products on it added via shortcode, correct?
And you want to know which products are not added on any pages. Unfortunately it is not possible to check automatically if there are products that are not added to a shortcode on any page.
I understand you currently do not use categories on the site, but that would be what we recommend to organize the products on separate shop pages. By using categories, you would be able to easily check if a product is not under any category on the Products page and once you add a category to it it would automatically be added to the page.
You can find more about this in this guide.
I hope this was clarifying. If you face any issues or have any questions, please let us know so we can assist you further.
Have a wonderful day!