What are the Security privileges for Supervisor Hierarchy in Area of Responsibility

Hi team,

Our customer has created AOR for an Employee "A" with Responsibility type as "Human resources representative", Hierarchy type as "Supervisor" and Top Manager as "B". When logged in as "A", and searching "B" in Person Management, "B" and his direct reports are not showing. Also when searching from Global Search, only few actions are showing for "B", not all the actions.

Can anyone suggest what are the Security privileges we have to add to able to access all things of "B"?

Regards

Dona Das