Hello,
If you want to get the Load more button on the home page use the WPBakery products element and use the display type Grid and Lazy Load button navigation http://prntscr.com/p76bti If you want to get the Load more button on the shop/product category page then install WooCommerce Infinite scroll plugin and edit settings according to theme documentation https://xstore.helpscoutdocs.com/article/65-woocommerce-infinite-scroll-and-ajax-pagination-settings
Regards
