By default, the Course Catalog only shows courses that you are not currently enrolled in. Enrolled courses and already completed courses will not appear in the Course Catalog.
If you would like to see all courses in the Course Catalog, even the ones that you are already enrolled in, you can select the option to Show Items I've Already Enrolled In, under the Filters section. When selected, the courses that are still available to enroll into will appear at the top of the list, while the already enrolled and completed course will appear on the bottom of the list.
