By default, non-global administrators can view, manage, and delete requests generated only by endpoints in their associated group (in My Organization).
If you review request details about the Request Details page, the number of requests listed in the Enterprise Level Activity pane might be less than the value displayed in the Global Prevalence column on the Policy Discovery page. This is because the Global Prevalence column indicates the enterprise-wide prevalence for the requests regardless of any groups. For example, if a request is generated by two systems in different groups across the enterprise, the value in the Global Prevalence is 2. But, because non-global administrators can only view the requests generated for their group, the non-global administrator might see only one request generated by the system in their group in the Enterprise Level Activity pane.
Note
The ePO - On-prem administrator can review and manage all requests generated in the enterprise (My Organization). Also, ePO - On-prem administrator can add rules to any rule group, and provide permissions to all non-global administrators to review and take custom actions on the requests generated in the enterprise.
If you are a non-global administrator, you can add rules (for a request) to only the rule groups that you own. Rule groups that you don't own are not displayed on the Policy Discovery: Custom Rules page. Also, if you take an action for a request, the action doesn't impact the same request generated by the system in a different group.