This section will be visible under Settings only if you are a Tenant Admin and your solution includes the Access Reviews add-on.
The “Contributors” report can be accessed under “Settings > Contributors”. The report lists all users that have been assigned at least one Access Review but are not CoreView operators. The “Contributor” role gives these user access to their Access Review task lists.
Actions
The report is read-only, but you have the option to export the list as a CSV or an Excel file.

CoreView operator Vs. Contributor roles
CoreView operators that have been assigned as reviewers of one or more Access Reviews will not appear in the “Contributors” list. Adding an existing contributor as a CoreView operator will also remove them from the “Contributors” list.
 
                            