How to Display DFF-Based Guidelines Only to Line Managers in Performance Documents > Overall Summary

The client wants to show some guidelines to line managers about performance ratings in the Overall Summary section as additional information. To do this, I created a text box by setting up a DFF under HRA_EVALUATIONS and deployed it. However, when I logged in as a manager and went to My Team > Performance Document > Overall Summary, the guidelines from the DFF are not showing up. Please guide me on how to make this work. Also, the guideline should be visible only to the line manager, not to the employee.

We know this can be done using Page Composer, but is there any way to achieve this using DFF?