Add Column to CPT with the menu_order value of a post

In this example, I used a „portfolio“ CPT. Change as needed.

/**
* add order column to admin listing screen for header text
*/
function add_new_portfolio_column($portfolio_columns) {
	$portfolio_columns['menu_order'] = "Order";
	return $portfolio_columns;
}
add_action('manage_portfolio_posts_columns', 'add_new_portfolio_column');

/**
* show custom order column values
*/
function show_order_column($name){
	global $post;

	switch ($name) {
		case 'menu_order':
			$order = $post->menu_order;
			echo $order;
			break;
		default:
			break;
	}
}
add_action('manage_portfolio_posts_custom_column','show_order_column');

/**
* make column sortable
*/
function order_column_register_sortable($columns){
	$columns['menu_order'] = 'menu_order';
	return $columns;
}
add_filter('manage_edit-portfolio_sortable_columns','order_column_register_sortable');