My students don’t see lesson extras. I can see them and I know how to Enable them. When I go to "edit section detail’ there is no option to enable lesson extras. We are currently working in CSD Unit 6 and I cannot add them. I have done this in the past and currently have a class working in Unit 3 that can access and see the Lesson Extras.
This support article discusses how Lesson Extras work. I’d recommend double-checking that you’re in the current 2020-21 version of the course. If you verify that, have students refresh their screens once you enable the extras.
If you follow the steps above and that still doesn’t work, I’d recommend filing a ticket at support.code.org so the engineers can clear that up for you.