I am Laura Vence, I work at edunext(Open edX partner) as the customer support lead. Allow me to address your questions.
1. Is Open edX only offers certificate-based learning?
- No, you can have graded courses and audit courses. You can find more information on how to set the grading policy on this page
- Additionally, you can find information on how to configure the certificates for your course on this page.
On the other hand, some configurations in Open edX require the certificate configuration such as course prerequisites.
You can also create audit courses that will not have certificates or grading policy configurations. You can find additional information on this page
- Can’t find Course Visibility for Unenrolled Learners option in Advanced Settings
You need to add a waffle flag to enable this setting. You can find more information on this page