Does the Unity IAP package include the Amazon IAP Plugin for Unity?

Recently for work, I've been asked to get our projects setup to work on the Amazon App Store.

I'm using Unity 2020.1.17f1.
I tried with the In App Purchasing package version 3.0.1 and then upgraded to 3.2.2.
With logging I can see all of my products being built. Following this we make a call to..

Code (CSharp):

1. public static void Initialize(IStoreListener listener, ConfigurationBuilder builder);
2.  

This ends up saying the initialization failed and that actually no products are available. We've setup all of our products on Amazon Developer for the app, and they are set to live.

Looking through Amazon's docs, they have a plugin for IAPs.
https://developer.amazon.com/docs/cross-platform-plugins/cpp-use-the-iap-plugin-for-unity.html

I wanted to ask if this is already a part of Unity's plugin. Or if I should include this instead.

Any advice in general for resolving this is appreciated.

 

Yes, we include Amazon support with IAP. From the menu Window/Unity IAP/Android/Amazon