By clicking on an item with multiple quantities (1) in the items module, the occurrences can be split into individual occurrences (2).
After the occurrences have been split.
By right clicking on an item with multiple quantities from In in Items List; the occurrences can be split into individual occurrences.
After the occurrences have been split.
Note that the items list must be unique. This feature is only available for Rooms with a derived status when a template is applied.