Subscription purchase with offer on iOS

Version of flutter_inapp_purchase

flutter_inapp_purchase: ^5.6.1

Platforms you faced the error (IOS or Android or both?)

IOS

Expected behavior

It is expected to present the discount/offer values

Actual behavior

The main subscription details is showed

Tested environment (Emulator? Real Device?)

Sandbox, real device

Steps to reproduce the behavior

I want to subscribe to a subscription that has a discount offer, that is a free trial

{
   productId: xxx.xxx.xx.base.1.annual,
   price: 299,
   currency: EUR,
   localizedPrice: 299,00 €,
   title: Annual,
   description: Annual Subscription,
   introductoryPrice: ,
   subscriptionPeriodNumberIOS: 1,
   subscriptionPeriodUnitIOS: YEAR,
   introductoryPricePaymentModeIOS: ,
   introductoryPriceNumberOfPeriodsIOS: ,
   introductoryPriceSubscriptionPeriodIOS: , 
   subscriptionPeriodAndroid: null,
   signatureAndroid: null, 
   iconUrl: null, 
   originalJson: null, 
   originalPrice: null, 
   discounts: [
     identifier: xxx.xxx.xxx.base.1.trial,
     type: SUBSCRIPTION,
     numberOfPeriods: 14, 
     price: 0.0, 
     localizedPrice: 0,00 €,  
     paymentMode: FREETRIAL, 
     subscriptionPeriod: DAY, 
   ]
}

I can I call the app store to show up this offer with a first time user

I am trying this,

await FlutterInappPurchase.instance.requestProductWithOfferIOS(
            productDetails.productId!,
            'xxx.xxx.xxx',
            offer.toJson(),
          );

but I'm getting allways the product details specifications, with the price and details

the offer in the code is the DiscountIOS on the list

Thank you in advance

dooboolab-community / flutter_inapp_purchase

Subscription purchase with offer on iOS #468