Where does the inventory package data come from for Debian

I am working on an issue with the package data for PHP on our systems and I have one that seems to have all the php7.4.x files but does not show the specific php7.4 file that I have built the signature on. This is working for other systems and when I check in the Package Data report, I see the php7.4 for all expected systems except one.

What command do I need to run on Debian to see this information? I am not sure if the scanner is using rpm or apt and I do not have access to the system, so I need to provide direction to the administrator.

Thanks

Martin