Добавить колонку «Товары» в страницу с заказами

add_filter('manage_edit-shop_order_columns', 'misha_order_items_column' );
function misha_order_items_column( $order_columns ) {
    $order_columns['order_products'] = "Purchased products";
    return $order_columns;
}

add_action( 'manage_shop_order_posts_custom_column' , 'misha_order_items_column_cnt' );
function misha_order_items_column_cnt( $colname ) {
	global $the_order; // the global order object

 	if( $colname == 'order_products' ) {

		// get items from the order global object
		$order_items = $the_order->get_items();

		if ( !is_wp_error( $order_items ) ) {
			foreach( $order_items as $order_item ) {

 				echo $order_item['quantity'] .'&nbsp;&times;&nbsp;<a href="' . admin_url('post.php?post=' . $order_item['product_id'] . '&action=edit' ) . '">'. $order_item['name'] .'</a><br />';
				// you can also use $order_item->variation_id parameter
				// by the way, $order_item['name'] will display variation name too

			}
		}
		
	}

}