DCIM_BIOSPassword Class returns No Value

I am running a Powershell Script to get the BIOS Status on Dell OptiPlex 9020 machine. But it's not return any value.

gwmi - Class DCIM_BIOSPassword -namespace root/dcim/sysman -Computer xxxx

I have tried to run wmic /node:PCNAME /namespace:\\root\dcim\sysman path dcim_biospassword get Attributename,IsSet  and the output is "No Instanace Available

I have installed Dell Command | monitor 9.0 from the dell website.

Please help