What exactly are you looking for? Hardware or Software? Raw data or processed data?
We are not getting last used date from SCCM feed and we have approached them for enabling this filed also for FNMS and they have asked us following:
Take a look at the following article which details where usage data in the Microsoft Endpoint Configuration Manager (aka SCCM) database is obtained from: Understanding and troubleshooting usage metering data imported from Microsoft Endpoint Configuration...
You should consider getting someone, an internal or external resource, with technical understanding, to support your FNMS/SAM environment.
To get some hands-on assistance from Flexera in relation to your deployment you should approach your account team (such as your Customer Success Manager or Account Manager) to discuss options. Feel free to send me a private message if you are unsure who your Flexera account team is and I can help to connect you.
With that said, getting information about your own SCCM database server and working out how to access information in there is something that would likely best be handled by system administrators within your own company.