How to navigate to 3rd party URL in Blazor WASM?

Hi,

I have an e-commerce solution. Using Blazor WASM .NET 6 for the client side. I am using a 3rd party payment gateway. Unfortunately, they don't have a great support and help desk so most of the time I am trying to find my way with trial and error. I am sending the necessary fields to the 3rd party service and get a successful result with some information.

...
"checkoutFormContent": "<script type=\"text/javascript\">if (typeof iyziInit == 'undefined') {var iyziInit = {currency:\"TRY\",token:\"2bbd1b79-63ec-49ae-8873-0e40ab511f0a\",price:1.20,pwiPrice:1.20,locale:\"tr\",baseUrl:\"https://sandbox-api.iyzipay.com\", merchantGatewayBaseUrl:\"https://sandbox-merchantgw.iyzipay.com\", registerCardEnabled:true,bkmEnabled:true,bankTransferEnabled:false,bankTransferTimeLimit:{\"value\":5,\"type\":\"day\"},bankTransferRedirectUrl:\"https://www.merchant.com/callback\",bankTransferCustomUIProps:{},campaignEnabled:false,campaignMarketingUiDisplay:null,paymentSourceName:\"\",plusInstallmentResponseList:null,payWithIyzicoSingleTab:false,payWithIyzicoSingleTabV2:false,payWithIyzicoOneTab:false,newDesignEnabled:false,mixPaymentEnabled:true,creditCardEnabled:true,bankTransferAccounts:[],userCards:[],fundEnabled:true,memberCheckoutOtpData:{},force3Ds:false,isSandbox:true,storeNewCardEnabled:true,paymentWithNewCardEnabled:true,enabledApmTypes:[\"SOFORT\",\"IDEAL\",\"QIWI\",\"GIROPAY\"],payWithIyzicoUsed:false,payWithIyzicoEnabled:true,payWithIyzicoCustomUI:{},buyerName:\"John\",buyerSurname:\"Doe\",merchantInfo:\"\",merchantName:\"Sandbox Merchant Name - 3397951\",cancelUrl:\"\",buyerProtectionEnabled:false,hide3DS:false,gsmNumber:\"\",email:\"email@email.com\",checkConsumerDetail:{},subscriptionPaymentEnabled:false,ucsEnabled:false,fingerprintEnabled:false,payWithIyzicoFirstTab:false,creditEnabled:false,payWithIyzicoLead:false,goBackUrl:\"\",metadata : {},createTag:function(){var iyziJSTag = document.createElement('script');iyziJSTag.setAttribute('src','https://sandbox-static.iyzipay.com/checkoutform/v2/bundle.js?v=1719893026454');document.head.appendChild(iyziJSTag);}};iyziInit.createTag();}</script>",
    "tokenExpireTime": 1800,
    "paymentPageUrl": "https://sandbox-cpp.iyzipay.com?token=2bbd1b79-63ec-49ae-8873-0e40ab511f0a&lang=tr",
...

I am navigating to the paymentPageUrl like this;

_navigationManager.NavigateTo(result.Data.ToString());

It redirects to the 3rd party checkout form.

After the payment process is completed, it redirects to the correct address (http://localhost:7169/OrderConfirmation) but the page is empty. Why might this situation occur? Do I need to do something about the checkoutFormContent when redirecting to the checkout form? Or do I need to open the checkout form differently, without using paymentPageUrl?