Set firstResponder in onAppear

[Amzd]

SwiftUI's onAppear is called before ViewRepresentables are added to the generated view hierarchy so it is impossible to know anything about the responders at this point.

The fix is to delay your call by a single loop:

.onAppear {
    DispatchQueue.main.async {
        chain.firstResponder = "MyList"
    }
}

If you do not like this syntax just add this extension and call it instead of onAppear

extension View {
    func onAppearAfterIntrospect(perform block: @escaping () -> Void) {
        self.onAppear {
            DispatchQueue.main.async(execute: block)
        }
    }
}