Are you looking to review all of the Rule-Admin-Product rules that exist in the system, or are you only looking for Rule-Admin-Product instances that were explicitly imported into the system?
To review all of the Rule-Admin-Product rules within a system, you can view the instance list by selecting SysAdmin>Product from the records explorer.
I'm not sure if there is an easy way to determine which Rule-Admin-Products were explicitly imported into the system, and someone else might be able to chime in if one exists. If there is not, you might be able to create a custom report that leverages the pxMoveImportDateTime property, which indicates the date and time a Rule-Admin-Product was imported. While I haven't done this myself, I suspect you could compare those dates against when you installed the system to determine what product rules were imported.
The pxMoveImportDateTime value should already be present on any imported Rule-Admin-Product instances. You can create a Report Definition in the Rule-Admin-Product class similar to below (you can adjust the display fields and filters to suit your purposes):