Are you looking for a way to customize your Empty Cart page and add some juice to it? Well, you can do it with the WooCommerce Product Page Builder for Avada and Fusion Builder.
Once you customize your Cart Page with the Woo Cart Element, it will also set your Empty Cart with the new design. However, if you wish to design the empty cart page yourself, you can simply design it as a regular page, save the page as Fusion Builder template in the library and then Go to the Woo Templates -> Settings and choose the newly created empty cart template.
Here's how the default empty cart template with our element looks like -