iOS/Sources/Shared/Extensions/UIViewController+Extensions.swift

import UIKit

public extension UIViewController {
    func dismissAllViewControllersAbove(completion: (() -> Void)? = nil) {
        var topViewController: UIViewController? = self
        while let presentedViewController = topViewController?.presentedViewController {
            if presentedViewController == self {
                break
            }
            topViewController = presentedViewController
        }

        if let topViewController, topViewController != self {
            topViewController.dismiss(animated: false, completion: completion)
        } else {
            completion?()
        }
    }
}