When the Symantec Endpoint Protection [SEP] Client is deployed through the JAMF in the operating system local Privacy & Security, Symantec system extension for full disk access is shown as disabled.
However, if verified through the Terminal command it shows as "Jamf Protect Endpoint Security Extension [ activated enabled]
Symantec Endpoint Protection 14.X on MAC operating system
Devices managed by MDM policies
This is expected behavior as the policies are managed by MDM.
If the local user toggles it ON there then it remains enabled even if MDM policy is withdrawn.