Camera rotation is already replicated.
From the pawn class… Get Base Aim Rotation
The Camera Component on Server and Simulated proxies does not get updated. Meaning the new values for pitch, roll, yaw are not applied to the component.
You have to manually apply these changes to the component as needed (on tick).
Relative Camera Location is also not updated on Server/Sim proxies. To get the actual location on these proxies you need to use Camera Manager → Get Camera Location.