So can you please post the Restrict access settings in your quiz as a screenshot so we can take a look?
I went to my own MoodleCloud site and added a test SCORM package from https://moodle.net/. I set it so that students had to view it for it to be marked complete. I then added a quiz and restricted the access of the quiz so that it was available only once the SCORM package had been marked as complete.
I then logged in with a test user account and it did work as expected - so let's see if we can replicate this on your MoodleCloud site.