(Description changed following discussion with rajeshtaneja and changed from bug to improvement.
As noticed in the Learn Moodle MOOC which is using a customised version of Boost, and verified on demo.moodle.net, if the teacher enables activity reports for students in Course edit settings, the only way they can access those reports is
- click the Participants link in the nav drawer
- find their own name
- click there.
It's not obvious.