Get a list of applicable coupons for each item?

Question

1C-Bitrix

Good afternoon!
Coupons of 3 types can be applied to goods in the basket: Coupon for one item of the order, Coupon for one order, Reusable coupon.
I'm trying to find out which coupon applies to a particular item.

$order = \Bitrix\Sale\Order::load(129929);

$discounts  =  $order ->getDiscount();
$arCoupon  =  $discounts ->getApplyResult();
foreach($arCoupon['COUPON_LIST'] as $cupon => $arrData){
}

From the information received, I don’t understand how to understand which product the coupon was applied to.