The Reporting Manager retrieves the available reports from the portal and lists them in the Overview panel. It can filter the reports for a range of criterias and allows you to search for specific reports by name.
Before you can use a report, you must add it to the current project by enabling the Added to project option. When a report is added to the project, it appears in the project items and you can then configure and process it.
Click the button to open the process the report.
Click the button to configure the report.
Changes done in this dialog are stored in the current ArcGIS Pro project. Make sure you store the project if they should be persisted.