Your asset view and collection list shows those items you can access.
A collection can be associated with a website or it can be an independent collection, like one created for a project or event. A collection that’s associated with a site is also associated with the repository that was chosen when the site was created. Check to make sure you are looking in the right repository when you view a collection list.
All users can view a collection when filtering assets, but you can only see those collections you can manage in the collection list. If you don’t see a collection listed when you click Collections, you don’t have a manager role for that collection.