OnReceive from RCP not functioning

A timeline in RCP will post a notification "Identifier: Completed" when it finishes playing

I am trying to receive this in the following way:

extension Notification.Name {
    static let notifyOnAnimationCompleted = Notification.Name("Completed")
}

// in the view
private let AnimationCompleted = NotificationCenter.default.publisher(for: .notifyOnAnimationCompleted)

RealityView {...}
.onReceive(AnimationCompleted)
        { _ in
            print("End")
        }

This was once working back to July, but it never prints "End" for now