Hi
I just noticed that superfish library is in JS and I am not sure Ludwig covers this case.
Maybe you can load this library from within your theme.
In order to do that you need to have a local version of your theme and not use the one provided by the infrastruture. I see that you use Bartik.
Bartik theme is included in Drupal. Download Drupal version 8.8.4
Copy the Bartik theme under the core/themes folder into your websites theme folder. Clear the caches.
Then add the Superfish js library within Bartik theme and add a line to load the file within the bartik.libraries.yml file. Save and clear caches.
If this solution doesn’t work you can open a ticket to Drupal infrastructure and ask them if they can add the Superfish library.