I have the same question

I am surprised this is Apple's recommended answer since almost always the TabView is the parent of the NavigationStack, not the other way around. And even if that is the case - what is the answer for the glitching animation if in fact the NavigationStack is a child of the TabVIew ?

ChatGPT says: "Selecting a host app for your test target is essential when testing StoreKit 2 functionalities like Product.purchase. StoreKit 2 requires a full app environment to simulate transactions, as it relies on app lifecycle events and system-level APIs that aren’t available in standalone unit tests. Setting up the host app should resolve issues with incomplete transactions and better simulate in-app purchase flows in your tests." Hopefully he is right :D (I haven't seen this in docs)

I was developing framework which should have been generic of platform. Hence there was no host application and I was getting the same error. After adding a host app it started working for me too. However I'd ideally don't wanna do that.

Thanks for your reply. Could you please explain how is that I can replace the return type of produceCommodities from [any Food] to [Food] and the compiler will accept it ? I am under the impression that the compiler won't be able to understand the concrete type of the produceCommodities function since it relies on an associated type until a specialization takes places (either by calling the function or by its implementation as explained in the lecture)