WSSA working with "samlSystemBrowser=true" command line but there is no such an option for SEP/SESC.
SEP/SESC can use dpOverride command for it's syntax like this for example:
C:\ProgramData\Symantec\Symantec Endpoint Protection\14.3.3384.1000.105\Data\Definitions\NTRDefs\20201218.930\wssad.exe
wssad.exe -p dpOverride=X.X.X.X
but doesn't have an option for browser authentication like "samlSystemBrowser=true"
In general Authentication Mechanisms via browser should not be used
"As a temporary method for testing/troubleshooting: Users authenticate in the system browser. "