You can add the “UPCP Product(s) List” widget to one of your theme’s widget positions. In this widget, you’ll be able to add the product IDs, Catalogue ID and set the number of products per row.
Or alternatively, you can use the insert-products shortcode with the catalogue_url and product_ids attributes.
[ insert-products catalogue_url=”http://mywebsite.com/shop” product_ids=”X,X” ]
Note: remove the spaces before/after the square brackets when using this code in your site.