You can see the course leaderboard by tapping on the 🏆 Trophy icon at the end of any learning or reviewing session (in the top right corner of the screen).
This leaderboard will include points for all learners that are enrolled in the same course, regardless of whether you follow them or not.
You will also be able to filter by points earned This week, This month, or All time.
If you're looking for information on the Groups leaderboard instead, please check this article.