Set up payment through Google Play (react-native-iap) in a React Native / Expo application

I already have a ready mobile application on React Native + Expo (expo-router), published on Google Play.
I need a developer who will fix the integration of react-native-iap and advise what exactly is wrong in the code/config.

Important:

• 
  

• I can send specific code files (copied text), screenshots of Play Console settings, and logs adb logcat.

• All changes should be provided as ready code snippets + instructions on where to insert them.

What is already available

• The application is on React Native 0.76+, Expo SDK 52, built using EAS Build (AAB).

• react-native-iap is connected (version 14.x).

• Products are created in Google Play Console (screenshots can be sent):

  • prolifetime – one-time purchase of PRO forever

  • pro_ai_bot – one-time purchase for bot access

  • pro_access – subscription to Noytrix PRO (with base plans)

Currently in the application:

• initConnection() returns true.

• When getProducts / getSubscriptions are called, the logs show:

  • undefined is not a function, products/subscriptions are not loading (empty arrays).

• When requestPurchase / requestSubscription are called, errors occur:

  • “Missing purchase request configuration”,

  • or “Subscription Noytrix PRO (pro_access) not found”.

• The Google Play payment window does not open.

What needs to be done

1. Investigate the logs and code to find out why:

   • getProducts / getSubscriptions are not working (v14 call format, etc.),

   • requestPurchase / requestSubscription gives the error “Missing purchase request configuration”.

2. Provide exact corrections:

   • how to correctly call getProducts / getSubscriptions in v14,

   • how to correctly call requestPurchase for in-app purchases,

   • how to correctly call requestSubscription for subscriptions with basePlan/offerToken,

   • what the configuration should look like (if something needs to be added to the Android project).

3. Explain which fields are mandatory in the payload (sku, skus, subscriptionOffers, etc.), and why Google Billing currently considers it “missing purchase request configuration”.

4. As a result, I need:

   • for the purchase and subscription to open the standard Google Play payment window on the device,

   • for the code to be compatible with react-native-iap 14.x and my RN/Expo setup,

   • a brief instruction: what changes were made and why.