Hello Jim,
Thanks for reaching out.
It appears that your storefront page has not been designed/configured yet, which is why the products are not displaying when accessed through the main menu.
Please follow the article below to properly create and configure the product page for your store:
https://www.joomshaper.com/blog/create-product-pages-for-joomla-online-store
This guide will walk you through the steps to set up the storefront and product listings correctly.
If you continue to experience issues after following the guide, please let us know and we’ll be happy to assist further.
Thanks.