The item that you were attempting to purchase could not be found

I have setup in app purchasing on Android and the Google Play Store. When I try to purchase the product from the Android app it returns this error: The item that you were attempting to purchase could not be found.

I have made sure of the following:

You MUST use a physical device. Emulators do not work.

Ensure you have app in Alpha/Beta with the NuGet installed.

Create an IAB product, make sure it is published and active.

Add a test account to the app, ensure it is the main account on device, and that account is opted-in as tester.

Validated your version code and number in your development environment match what is in the Play store.

You MUST sign the APK even in debug mode.

Please could I receive some support. Many Thanks!

Bug Information
Version Number of Plugin: 7.1.0
Device Tested On: Physical Samsung A40
Simulator Tested On: N/A
Version of VS: 17.6.7
Version of Xamarin: .NET Maui 7.0.100

Steps to reproduce the Behavior:
Setup in app billing on Android and Google Play.

Expected Behavior:
Should be able to purchase the product.

Actual Behavior:
Error: The item that you were attempting to purchase could not be found.

Code snippet

var purchase = await billing.PurchaseAsync(productId, ItemType.InAppPurchase);

Screenshot