The tables [sc_cat_item] and [user_criteria] are not audited within the base system out of the box.
The reason of this OOB configuration is that these two tables are heavily used within the platform and can generate a large number of updates. These updates will fill the audit history table and could, in turn, have an impact on the instance performance.
Administrators are allowed to enable auditing for these tables by changing the dictionary settings, however, this is not recommended.
SN documentation pages: Auditing