display WCFF field on backoffice orders page

Hello guys,
First thank you for this plugin which is very helpfull for me.

I’m a begginer in developping, but I’m trying to display WCFF fields on woocommerce backoffice orders page, to achieve a better reading of what orders contain.

For that, here is the code I work on, which I put in functions.php.
I’m able to display a new column in which I’m able to insert product description for example. But I didn’t find how to get my WCFF fileds to be displayed here.

Here is my code :

<?php
// Add a new custom column to admin order list
add_filter( 'manage_edit-shop_order_columns', 'admin_orders_list_add_column', 10, 1 );
function admin_orders_list_add_column( $columns ){
    $columns['custom_column'] = __( 'New Column', 'woocommerce' );

    return $columns;
}

// The data of the new custom column in admin order list
add_action( 'manage_shop_order_posts_custom_column' , 'admin_orders_list_column_content', 10, 2 );
function admin_orders_list_column_content( $column, $post_id ){
    global $the_order;

    if( 'custom_column' === $column ){
        $count = 0;

        // Loop through order items
        foreach( $the_order->get_items() as $item ) {
            $product = $item->get_product(); // The WC_Product Object
            $style   = $count > 0 ? ' style="padding-left:6px;"' : '';
        	$meta0   = $product->get_meta_data();

            // Display product description, but I want to display my WCFF fields here
        	printf($product->get_description());


            $count++;
        }
    }
}
?>

Can you help me finding how to catch the fields to display them please ?