Mary, when a parent logs into Moodle, clicks on their child's name from the Mentees block, then clicks on a course, they can see all the activities for their child listed.
They can't get into them to see more detail, however, it will be confusing if this screen does not take into account the groupings because it will show that their child has to do multiple assignments when actually only the ones for their grouping will apply to them.
If no-one knows the answer, I'll experiment after Christmas to see how it goes.
Many thanks
Daniel