Export integration interface does not export series with only client expression

Hi,

The local forecast export interface has 'Final Forecast' series that does not have a update field and runs only on client expression and wondering how this series is exported.

Based on this, we expected a few series to be exported to a flat file for customer reporting requirements. These series have only client expressions. Export interface is not exporting these series and showing 0 or NULL.

Any inputs will be very helpful.

Thanks!