sap FSM validation rule for mobile app

Hi,

Is it imaginable to make a concern regularisation of benignant Validation for the mobile app? The concern request is that earlier checkout, the feedback codification should beryllium entered by the tract work technician. Making the feedback codes connected the feedback surface (ActivityFeedback Mobile) mandatory does not lick this requirement. Or is this imaginable via the Required Expression successful tract 'activity.feedbacks' successful surface Activity Mobile?

Kind regards,

Jan-Adriaan