How to show a caret in a WebView2 control?

Question

I would like to see a caret in my WebView2 implementation.

For doing this, I tried this:

var options = new CoreWebView2EnvironmentOptions();
options.AdditionalBrowserArguments = "--enable-caret-browsing";
var _createTask = CoreWebView2Environment.CreateAsync(
    null,
    "C:\\",
    options);
_createTask.ContinueWith(
    (task) =>
    {
        RunOnUiThread(
            () =>
            {
                EnsureCoreWebView2Async(task.Result);
            });
    });

... but I still don't see a caret inside the WebView2 control. Why not, and how can I show it?

The --enable-caret-browsing feature is described here.