Actually – just found the solution in your code samples.
https://algolplus.com/plugins/code-samples/
// duplicate each item "qty" times! and set qty=1 for the item
add_filter( "woe_fetch_order_products", function ($products, $order, $labels, $format, $static_vals) {
$new_products = array();
//need to know counters, as field "qty" can be omitted in output!
foreach($order->get_items('line_item') as $pos=>$item) {
if( !isset($products[$pos]) )
continue;
if( isset($products[$pos]['qty']) )
$products[$pos]['qty'] =1;
for($i=0;$i< $item['qty'];$i++)
$new_products[] = $products[$pos];
}
return $new_products;
} , 10, 5);
