Add a continue shopping button at single product page on WooCommerce.

continue-shopping-button.php

<?php 


/**
 * @snippet       Add a continue shopping button at single proudct page | WooCommerce
 * @author        WooXperto
 * @date          10.08.2023
 */

add_action( 'woocommerce_single_product_summary', 'WooXperto_continue_shopping_button', 31 );
 
function WooXperto_continue_shopping_button() {
  if ( wp_get_referer() ) echo '<a class="button continue" href="' . wp_get_referer() . '">Continue Shopping</a>';
}