Cant able to open pop ups in WKWebview

In one of my iOS application I need to integrate a website, and I am successfully done that part, inside we have a option to deposit money to play the poker game for that we have two modes of payment 1. cashfree and 2. paytm. Though paytm mode I can able to do that part successfully, but through cashfree mode, I can't able to do it, out of my debugging I cam e to know that through the cashfree mode at the final stage, the website is trying to show a success or failure selection pop up in a new tab. From the WKWebView success or failure selection pop up is not loading.

I followed couple of solutions which are exist over different articles and forums but no luck.

below are my respective WKWebView references

Code Block     
@IBOutlet weak var wkWebView: WKWebView!
 var popupWebView : WKWebView?

Code Block 
func configureWebView(webViewName: WKWebView?, url: String) {
             if let webView = webViewName{
                 webView.isOpaque = false
                 webView.uiDelegate = self
                 webView.backgroundColor =  colorLiteral(red: 0.1333333333, green: 0.1725490196, blue: 0.2352941176, alpha: 1)
                 webView.allowsBackForwardNavigationGestures = true
                 webView.navigationDelegate = self
                 webView.allowsBackForwardNavigationGestures = true
                 webView.configuration.preferences.javaScriptCanOpenWindowsAutomatically = true
                 webView.configuration.preferences.javaScriptEnabled = true
                
                 if let cookie = getCookies() {
                     webView.configuration.websiteDataStore.httpCookieStore.setCookie(cookie)
                 }
                 if let url = URL(string: url) {
                     webView.load(URLRequest(url: url))
                     startTimer()
                 }
             }
    }
/*MARK: Getting called when intended url is about to load in  from the delegate method of WKWebview, that is createWebViewWith configuration 
*/
func createPopupWebView(for url: String, config: WKWebViewConfiguration) {
        popupWebView = WKWebView(frame: CGRect(x: 50, y: 50, width: view.bounds.width - 150, height: view.bounds.height - 150))
        popupWebView = WKWebView(frame: view.bounds)
        popupWebView?.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        configureWebView(webViewName: popupWebView, url: url)
    }

Code Block 
//MARK: - WKUIDelegate delegates
extension HomeViewController: WKUIDelegate {
    func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
        if navigationAction.targetFrame == nil {
            if let urlStr = navigationAction.request.url?.absoluteString{
                if urlStr != Constants.Staging.lobbyScreen {
                    let modifiedUrl = urlStr + "?display_mode=app"
                    if urlStr != Constants.Staging.cashfreeDeposite {
                            //mutable url request code goes here
                            webView.load(mutableRequest as URLRequest)
                                                    
                    } else {
                       createPopupWebView(for: modifiedUrl, config: configuration)
                    }
                }else {
                    webView.load(navigationAction.request)
                }
            }
        }
        return nil
    }
}