Add custom fields to woocommerce order email

// Add custom fields to woocommerce order emails
function action_woocommerce_email_customer_details( $order, $sent_to_admin, $plain_text, $email ) { 
   if ( $sent_to_admin ) {  //add to admin email only
    echo '<p><strong>Warehouse Location</strong>';
        
      $items = $order->get_items(); 
      foreach ( $items as $item ) {
        $product_id = $item->get_product_id();
        $product_name = $item->get_name();
        
        $location = get_field( 'location', $product_id );
        if( $location ){
           echo '<p>' . $product_name . ' - ' . $location . '</p>';
        }

      }
   }
}; 
add_action( 'woocommerce_email_customer_details', 'action_woocommerce_email_customer_details', 10, 4 );