textContentType telephoneNumber can't show telephone

I set keyboardType to telephoneNumber and keyboardType is numberPad,telephoneNumber can't show,but I change the keyboardType to numbersAndPunctuation,the telephone can show,how to show telephone in keyboard is numberPad in iOS14

this is my code
     let input = UITextField.init()
    input.backgroundColor = UIColor.red
    input.frame = CGRect(x: 100, y: 300, width: 200, height: 50)
    input.textContentType = .telephoneNumber
    input.keyboardType = .numberPad
    input.delegate = self
    input.autocorrectionType = .yes
    view.addSubview(input)