2 points of data are needed for the filter face velocity to show up on the report.
After these data points are entered, the app will use the estimated airflow calculation to determine the filter face velocity.
Keep in mind, the data that you see on the report is snapshot data that is captured from the live measurements and calculations the instant you click the "Save Test In" or "Save Test Out" button. If you save a snapshot before you set the filter size or profile info, the data on the report will not reflect the changes you made to the filter or profile info after you took the snapshot.
For details on the airflow estimation, see How is the Estimated Airflow Calculated. For other report customization options, see Report Settings & Customization.