Godot 3.5 Android & iOS In-App Purchases + AdMob Rewarded Ads Integration with Example Project

I am looking for a developer to deliver a fully working Godot 3.5 example project that demonstrates:

1. In-App Purchases (IAP)
* Support for Android (Google Play Billing) and iOS (StoreKit latest version).
* Must include initialization, purchase, and restore purchase flows.
* Should run and work correctly on real devices (not just simulators).
* Based on latest Google Play & StoreKit APIs.

2. AdMob Rewarded Ads
* Full integration of AdMob rewarded ads into the Godot 3.5 example project.
* Example flow: pressing a button triggers a rewarded ad, and after completion the user receives an in-game reward.
* Include proper validation/verification methods if available (e.g., reward validation callbacks).

Deliverables:
* A Godot 3.5 example project with both IAP and AdMob Rewarded Ads integrated.
* All necessary code, libraries, or plugins.
* Clear documentation

Goal:
At the end, I should be able to open the provided project, enter my own credentials (Play Store, App Store, AdMob IDs), run it on Android and iOS, and successfully test both In-App Purchases and Rewarded Ads with rewards validation.

Requirements
Only developers with prior experience in Godot 3.5 mobile integrations (IAP & AdMob) should apply.