A course uses Cohort sync to enroll Cohort X. Everyone in Cohort X thus has access to all materials and activities within the course.
But there is a single activity within this course we'd like to make available to Cohort Y. This should be doable, since there is a local roles button next to each activity.
However, when I click on the roles button next to the given activity, for "student" I see on the left all of the members of Cohort X (which is correct, since they are all auto-enrolled in the course). And my expectation is that on the right I would see a list of ALL users, so I could manually assign another cohort or an individual user to this one activity.
However, on the right I see only a partial list of users - those who are in Cohort X (the ones enrolled); this isn't helpful, since all of these users are automatically defined as "students" for this activity (since they are enrolled in the course).
I can't figure out how to grant a given cohort (or single user) access to a specific activity within a course, unless they are enrolled in the entirety of the course.