This solution works including iOS 18.

@objc @discardableResult private func openURL(_ url: URL) -> Bool {
    var responder: UIResponder? = self
    while responder != nil {
        if let application = responder as? UIApplication {
            if #available(iOS 18.0, *) {
                application.open(url, options: [:], completionHandler: nil)
                return true
            } else {
                return application.perform(#selector(openURL(_:)), with: url) != nil
            }
        }
        responder = responder?.next
    }
    return false
}

Solution from https://stackoverflow.com/a/78975759/1915700