How to Delegate from Parent to Multiple Different Childs?

Question

I have this scheme:

• HomeController
  • NavigationController
    • Step1 (child of NavigationController)
    • Step2 (child of NavigationController)

My problem is that i dont know how to pass info from Parent to all different childs, Because when i assign delegate to childs, always it take the last one. So if i call to delegate, only the last child that i have been added receive that the info

Some basic code:

class HomeController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        addSubview(showSteps)
    }
    @objc func showSteps() {
        let controller = NavigationController()
        self.present(controller, animated: true, completion: nil)
    }
}


protocol UserProtocol: AnyObject {
    func userHasChanged(_ user: User?)
}


class NavigationController: UIViewController {

    var user: User?
    weak var delegate: UserProtocol?
    
    override func viewDidLoad() {
        
        // all step childs are differents
        let step1 = Step1()
        addStep(step: step1)
        delegate = step1
        
        let step2 = Step2()
        addStep(step: step2)
        delegate = step2
        
        let step3 = Step3()
        addStep(step: step3)
        delegate = step3
        
        let step4 = Step4()
        addStep(step: step4)
        delegate = step4
        
    }
    
    func addStep(step: UIViewController){
        self.addChild(step)
        step.willMove(toParent: self)
        view.addSubview(step.view)
        step.didMove(toParent: self)
    }
    
    func userHasChanged(_ user: User?){
        // this observe new user data from firebase
        Service.shared.fetchUserData(uid: "XXX") { user in
            self.user = user
            // send new data to childs
            // ONLY SEND TO CHILD4, (THE LAST ONE OBVIOUSLY)
            self.delegate?.userHasChanged(user)
        }
    }

}

// that is a child example
class Step1: UIViewController, UserProtocol {
    
    var user: User?
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    func tripHasChanged(_ new_user: User?) {
        print("changed1")
        self.user = new_user
    }

}

class Step2: UIViewController, UserProtocol {
    
    var user: User?
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    func tripHasChanged(_ new_user: User?) {
        print("changed2")
        self.user = new_user
    }

}

class Step3: UIViewController, UserProtocol {
    
    var user: User?
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    func tripHasChanged(_ new_user: User?) {
        print("changed3")
        self.user = new_user
    }

}

class Step4: UIViewController, UserProtocol {
    
    var user: User?
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    func tripHasChanged(_ new_user: User?) {
        print("changed4")
        self.user = new_user
    }

}

*Only prints "changed4"

My question:

How can i do to send data to all different childs with one delegate (array maybe?)?. It is possible, Belongs to good practices?

Thanks!