What's the difference though? You have @State region or @State vm - they are both states of the view. If you (Map) update region, it updates the main view's state. If you (Map) update vm, it has a published property, so it also updates the main view's state. In my simple experiment both of these implementations were causing exactly the same warning. Tested with iOS 16. Which makes sense to me, as both versions are doing the same thing - updating state of the main view.