Hi,
You can use Get-ChildItem to list the registry keys, for example
Get-ChildItem -Path “HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall”
To confirm which registry keys are used in SCCM, since SCCM is not currently supported in the Microsoft Support Community, it is recommended to repost your question in Microsoft Q&A.
https://learn.microsoft.com/en-us/answers/questions/
Click the "Ask a Question" button in the upper right corner to post your question and select the "Microsoft System Center" tag.