beginRefundRequestIOS does not work for consumable IAPs — SKUs not found after purchase

[TadasMil]

When purchasing consumable IAP products using expo-iap (v3.1.35) on iOS 11 (iOS 26 API level), the purchase flow works, the transaction is finished, and App Store Server Notifications (ASSN) successfully hit my backend — but refund requests fail.

Calling:

await beginRefundRequestIOS(sku)

always throws:

Error: SKU not found

Debugging shows:

[IAP debug] available for sku com.example.cash.100000 []
[IAP debug] latestTransactionIOS: null
[IAP debug] isTransactionVerifiedIOS: false

So expo-iap cannot see the consumable transaction locally, even though the purchase was successful and ASSN confirms Apple processed it, because my server did receive the purchase event

This makes it impossible to use the refund sheet for consumables, even though Apple supports refunding consumables via StoreKit 2 (Transaction.beginRefundRequest(for:in:)).

Environment

expo-iap: 3.1.35
Expo SDK: (managed workflow)
iOS version: 11 (API level 26) — real device
Product type: Consumable IAPs
Finish transaction: called with isConsumable: true:

 await finishTransaction({
          purchase,
          isConsumable: true,
 });

ASSN V2: Working — receipts and purchase notifications do arrive on server
Sandbox tester: same account for purchase + refund attempt

[TadasMil]

?