Hierarchy in Report Builder

Create a recursive hierarchy group

1. In Design view, add a table, and drag the dataset fields to display. Typically, the field that you want to show as a hierarchy is in the first column.

2. Right-click anywhere in the table to select it. The Grouping pane displays the details group for the selected table. In the Row Groups pane, right-click Details, and then select Edit Group. The Group Properties dialog box opens.

3. In Group expressions, select Add. A new row appears in the grid.

4. In the Group on list, type or select the field to group.

5. Select Advanced.

6. In the Recursive Parent list, enter or select the field to group on.

7. Select OK.

   Run the report. The report displays the recursive hierarchy group, although there is no indent to show the hierarchy.

More details: 

Create a recursive hierarchy group in a Power BI paginated report - Power BI | Microsoft Learn

Create recursive hierarchy groups in a paginated report - Power BI | Microsoft Learn

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