Why Selected Accounting period is not showing start period and end period

Summary:

We are developing an FRS report and are using a Range prompt for the Accounting Period parameter.

We would like to display the selected accounting period range in the report header. For example, if the user selects a range from Jan-25 to Mar-25, we want the header to display:

Selected Accounting Period: Jan-25 to Mar-25

Currently, we are able to use the Range prompt for filtering the report data, but we are unable to retrieve the selected prompt values (start and end of the range) to display them in the report header.

Could you please advise if there is a supported way to retrieve and display the values selected in a Range prompt within the FRS report header? If so, please provide the recommended approach.