You want to see the firewall ruleset that has been created in the Symantec Endpoint Protection Manager (SEPM) from the Symantec Endpoint Protection (SEP) interface.
Working as design.
With a policy that has Mixed Control mode enabled under -> Location-specific Settings -> Client User Interface Control Settings for the client group, open the SEP agent interface:
Note: We cannot see SEPM Administrator custom defined rules on the client side. Its working as design.