Whilst we are in the transitional phase of the classic list view and new list view adding a list to the hierarchy is handled differently.
Adding a list to a hierarchy node
1. Browse the hierarchy to get to the node you wish to add a list to OR use the search box to search for the hierarchy node (selecting the module/course/unit in line with your university terminology)
2. Click +Add List
3. Type in the search box the list you wish to attach
4. This is then attached to the node
Whilst both classic list view and new list view are accessible, you can also select Beta > View 1.0 and take the action there.