That's indeed a great article, however, I have some feedbacks if you don't mind:

1) In your architecture diagram, I would not link Interactor and Entity with a two-way arrow since Entity doesn't access the context of Interactor in the same manner, besides I don't even consider Entity as a layer since it doesn't contain any logic. But Uncle Bob does, so it makes some sense.

2) You placed all the entire API call within your Interactor, however, since the fetch operation might not be restricted to one single use case in a bigger application, it's worth creating a separated Service layer that could handle API calls and could be used in multiple screens. Everything should be the most isolated as possible. The Service is considered as an extra-scene layer because of that, you can check it in: https://pedroalvarez-29395.medium.com/clean-architectures-inner-and-outer-scene-layers-38e6de923f07

3) In your Presenter layer you only instantiate your Interactor once calling fetchPokemonList, which is not recommended because if you implement more functions, you may lack integrity due having multiple Interactors with different source-of-truth states. Apart of that, it's also recommended to access the Interactor through a protocol to ensure testability and the applicability of SOLID principles.

Really appreciated this article, and you explained the concepts of each layer with excellence, but I would not recommend VIPER to a SwiftUI project because it kinda removes the "reactivity" part of your scene due too many imperative code. Combine solves a lot of this problem, but I still believe VIPER and VIP were designed mostly to UIKit projects.