You can duplicate a Course, a Course Lesson, or a Course Section. To do this, click on the 3 dot menu when you see a Course, Lesson, or Section "card" and choose Duplicate.
This will create a copy of the structure and materials for that Course, Lesson, or Section.
You will then be prompted to choose how the Course should be duplicated. You'll be given the option to not duplicate any posts, duplicate all Instructor posts, or duplicate all posts. The video embeds, text, and pictures will be retained. Comments will not be retained.