This is one among the most commonly reported issues. There might be a number of reasons why this happens and here are some of the prominent reasons. The following article might be of help to you to understand some of the common reasons for product not being displayed in the store front.
Product created but is not reflecting in the storefront.
Navigate to J2store Cart.Check if the “Treat as a product” is to Yes.
Check your product status.Make sure you have the status as Published .
Make note of the category which you have set for the Article. Navigate to Menu ->All menu items ->Your product menu ->Details ->Choose a category. Check if the category to which the article belongs is chosen.
Make note of the category which you have set for the Article.Navigate to Content ->Article->category and check whether the category to which the article belongs is published.
Navigate to Menu ->All menu items -> your required menu . Check whether the menu containing the category of the article is published .