Query pre-orders

Hey, I have a custom page in my admin area and need to query any orders that are pre-orders.

$customer_orders = wc_get_orders([
‘status’ => ‘processing’, // Only fetch orders with the “processing” status.
‘orderby’ => ‘date’, // Orders will be ordered by the date (most recent first).
‘limit’ => 10, // Limit the number of orders fetched to 500.
‘meta_query’ => array(
array(
‘key’ => ‘_order_has_preorder’,
‘value’ => ‘yes’,
‘compare’ => ‘=’,
),
),
]);

Am i right in thinking _order_has_preorder is part of the order meta?

Any advice appreciated.