Hi Ovidiu,
Please check this SAP Note 1718540 - Action Usage by User, Role and Profile Reports
You can check in SM34 for View GRFNVC_ITEMAUTH where you can find the mapping of Menu Item Id to "Authorization Objects"
The SM34 view comprises of:
Menu Authorization Entity Mapping
Menu Item (Item Auth Mode is PFCG)
PFCG Auth Mapping Table
In PFCG Auth Mapping Table you will see the references to the Menu Item Ids with descriptions
The link to which report you are launching is based on the launchpad (LPD_CUST).
The item configuration will contain the "Add Information" for MENUITEMID = xxxx which is under the "Advanced Parameters"
For creating Custom authorization objects SAP has provided option to use the view GRFNVC_ITEMAUTHC
Regards,
Madhu.