You can "Save As" the project file as an archive (.PLA). then "Open" the .PLA and choose the option "Extract elements to a folder". This will create a .LIB folder with all objects that were inserted in the original file. You can then manually compare the .LIB sub-folders to the loaded libraries.
David Larrew, AIA, GDLA, GSRC
Architectural Technology Specialist
a r c h i S O L U T I O N S
WIN7-10/ OSX 10.15.7
AC 5.1-25 USA