Using QDesktopServices with Android 11 scoped storage

Question

My Qt6 Android application creates .html files in the local storage using QStandardPaths:

QString fileName=QDir(QStandardPaths::writableLocation(QStandardPaths::DownloadLocation)).filePath("example.html");
QFile file(fileName);
if (file.open(QIODevice::WriteOnly)) {
    file.write(getHTMLString());
    file.close();
}

In the past, I used to make the device browser app open the newly created file by calling QDesktopServices:

QDesktopServices::openUrl(QUrl::fromLocalFile(fileName));

However, since Android 11 has made its scoped storage concept mandatory, QDesktopServices fails in opening browser apps. Only file managers and other apps that (I suppose) declare the MANAGE_EXTERNAL_STORAGE permission are able to open the file.

What is the most straightforward way to make Android open my local .html files with the default browser?