WooCommerce: Change the number of related products displayed in your shop

1. Add the following code to the functions.php file of active theme

// Customize Woocommerce Related Products Output

 Example 1. Display 4 products in 2 columns

 function woocommerce_output_related_products() {
      woocommerce_related_products(4,2);       // Display 4 products in 2 columns
 }

Example 2. Display 4 products in 4 columns

// Customize Woocommerce Related Products Output
function woocommerce_output_related_products() {
      woocommerce_related_products(4,4);   // Display 4 products in 4 columns
}