A dependency report can show what features/master features are impacted or related to other features/master features.
We have no report that shows the opposite: which features/master features are not impacted or not related to any other feature/master feature.
This is especially useful when you have a MRD (series of marketing requirements) and use cases, and you want to identify which requirements have not been impacted by or referred to by any use case.
Likewise it is useful to know which use cases do not have any formally written marketing requirements driving the use case.