How to use a UserAgent, headers and CookieContainer on WebView2?

Question

Using a WebView2 control, I am trying to load into a webpage, but after I log into it, it seems it has some sort of block for generic browser that is not well configured because it keeps loading instead of proceed after the login, so I would like to add a CookieContainer and specify to use Cookies, add headers that specify that decompression is supported and what decompression methods are handled and User agent on WebView2 control same way this answer works for HttpRequest. Looking online I only found some code that I've tried to put together, but that's c# and I'm trying to convert it for vb.net but no online tool succeded to convert it yet

Private Sub webView2_NavigationStarting(sender As Object, e As Microsoft.Web.WebView2.Core.CoreWebView2NavigationStartingEventArgs) Handles webView2.NavigationStarting
    webView2.AddScriptToExecuteOnDocumentCreated("
        window.WebView2.addEventListener('beforenavigate', function(event) {
            event.preventDefault();
            var xhr = new XMLHttpRequest();
            xhr.open(event.detail.verb, event.detail.uri, true);
            xhr.setRequestHeader('User-Agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36');
            xhr.setRequestHeader('Cache-Control', 'no-cache');
            xhr.setRequestHeader('Accept-Encoding', 'gzip, deflate');
            xhr.onreadystatechange = function() {
                if (xhr.readyState === XMLHttpRequest.DONE) {
                    window.WebView2.injectWebResource(event.detail.id, xhr.responseText);
                }
            };
            xhr.send();
        });
    ")
End Sub

Am I using the rights methods?

edit1: I've managed to add the UserAgent

 Private Sub WebView21_NavigationStarting(sender As Object, args As Microsoft.Web.WebView2.Core.CoreWebView2NavigationStartingEventArgs) Handles WebView21.NavigationStarting
        Dim userAgent As String = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36"
        Dim script As String = $"window.navigator.userAgent = '{userAgent}';"
        WebView21.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync(script)
    End Sub

but still it doesn't proceed after the login.