make individual questions in question set be required

Thank you for the suggestion. That sounds like a feature that would need to be added to that particular H5P interactive type, and not the Drupal H5P library. If this is something you are still interested in, I would suggest adding your feature request to the Issue list for that H5P Question Set project here: https://github.com/h5p/h5p-question-set/issues

Closing here since this isn't something this module can implement. Hopefully the H5P project itself can incorporate this suggestion!