How to change UIMenu alignment and font in Swift?

I want to change UIMenu alignment and font. There is a identifier in UIMenu

open class UIMenu : UIMenuElement {
    /// Unique identifier.
    open var identifier: UIMenu.Identifier { get }
}

And there is a extension for it

extension UIMenu.Identifier {
    /// Align Left, Center, Justify, Align Right menu
    @available(iOS 13.0, *)
    public static let alignment: UIMenu.Identifier
}

let menu = UIMenu(title: "", image: nil, identifier: nil, options: [], children: menuItems)

I want to set right value for it but I don't know how to do it.