Question:
Is it possible to add new team members to existing assignments?
Answer:
Currently, new members cannot be added to existing assignments. If a new member joins a group after the administrator has created an assignment, that member cannot see it.
As a workaround, the group admin can create a new assignment for everyone or individually assign a new assignment to the new member(s). Note that assignments do not require members to re-take completed content, so members who have already completed the assignment will automatically be marked as complete.