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I would like to compare what I'm doing (wrongly, it seems) to the video. Where's the demo project? In short, I'm seeing that the runtime is complaining with [SwiftUI] Publishing changes from background threads is not allowed; make sure to publish values from the main thread (via operators like receive(on:)) on model updates. despite using @MainActor. And, it isn't clear where to instantiate the model object. I get a warning Expression requiring global actor 'MainActor' cannot appear in default-value expression of property '_manager'; this is an error in Swift 6 So while this is very promising, it is hard to discover the correct and modern way to implement asynchronous behavior in SwiftUI.