How to print a web page without first rendering it on a page?

Given a URL, how can I print what is at that URL on iOS, without displaying a WKWebView (or WebView in XF)?
I find that if the URL is that of an asset such as a .png file then it works, but if it is that of a page then it doesn't.

I've tried a few ways, the simplest being:

                    if (Foundation.NSUrl.FromString(url) is Foundation.NSUrl nsUrl
                        && nsUrl.Scheme != null)
                    {
                        UIKit.UIPrintInfo printInfo = UIKit.UIPrintInfo.PrintInfo;
                        printInfo.JobName = printJobConfiguration.JobName;
                        printInfo.Duplex = UIKit.UIPrintInfoDuplex.None;
                        printInfo.OutputType = UIKit.UIPrintInfoOutputType.General;

                        UIKit.UIPrintInteractionController printController = UIKit.UIPrintInteractionController.SharedPrintController;
                        printController.ShowsPageRange = true;
                        printController.ShowsPaperSelectionForLoadedPapers = true;
                        printController.PrintInfo = printInfo;
                        printController.PrintingItem = Foundation.NSData.FromUrl(nsUrl);

                        printController.Present(true, (printInteractionController, completed, error) =>
                        {
                            // error reporting goes here
                        });
                    }

With the above implementation, the print preview that appears has the correct number of pages, but they are all blank.

I've also instantiated a new WKWebView, issued a LoadRequest and waited for EstimatedProgress to be 1.0, before printing the WKWebView. Again, that doesn't render the content. I am assuming because the WKWebView itself is not rendered on a page.

Any ideas how to do this without rendering the WKWebView on a page?