Yes, search-based certification campaigns can be used to review access for non-correlated accounts.
Non-correlated accounts are accounts that do not have a direct link to any identity in the system, which means they may represent orphaned or unmanaged accounts. Search-based certifications allow administrators to create campaigns based on specific criteria, including targeting these non- correlated accounts to ensure they are properly reviewed and addressed within the organization.
Reference:
SailPoint IdentityNow Search-Based Certification Campaign Guide.
SailPoint IdentityNow Non-Correlated Account Management Documentation.