Hi @Maksims Vasiļjevs ,
Only software listed within the HKLM or the HKCU for the local system account profile is inventoried and then displayed. When users install software within their user profile, it is stored within HKCU for that user. The local system account doesn’t have access to other users’ HKCU profiles, so it could not report on software titles that it could not access. So maybe we could not get report from SCCM of installed software per user.
For more details, we could refer to this article:
https://www.enhansoft.com/user-installed-software-and-why-you-should-care/
Note: the above links are not from MS, and just for your reference.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.