window.postMessage not working in IOS

I am building a multiplayer game for IOS and android and when everything is ready I send match data to webview

IEnumerator DelayRoutine()
{
    yield return new WaitUntil(() => { return IsLoadingDone; }); // Wait for Webview Loading done

    webViewObject.EvaluateJS($@"window.postMessage({data}); ");
    matchStarted = true;

    yield return new WaitForSeconds(1f);

    WindowsManager.Get.ShowWindow<HudWindow>();
}

Thats the piece of code responsible for sending data to webview.
" webViewObject.EvaluateJS($@"window.postMessage({data}); ") "

this piece of code is working fine in Android, but its not working in IOS. I also have done this step " enableWKWebView: true ".

Appreciate you help in this regard. Thanks

Start with the DelayRoutine entry point and the EvaluateJS call shown in the issue, then compare how the same postMessage invocation behaves in the iOS webview versus Android. Reproduce the reported match-data flow on iOS and trace whether the message reaches the webview; done means the data is received there consistently.