Are you frustrated that your eShop doesn't support your Custom Post Types and Taxonomies? Fix it with this plugin.
Using as example a Post Type called Portfolio (it can be whatever type you have created), we see it listed in the select box along with all other WordPress post types. Select the desired custom or default types for eShop to support and save the changes.
Edit or create a Custom Type article and see that the eShop Product Entry pane is now showing.