Flexible workflow logging

Dear SAP experts,

Does anyone know if changes in the flexible workflow to start conditions and approval steps are logged in SAP and if so where? For example if the Recipient in the flexible workflow for purchase orders is changed, where in the SAP backend can I see the changes? So far I have not been able to find it and I wouldn't be surprised if audit will start asking question about whether changes to flexible workflow are captured (apart from the WF definition which is captured in a transport request)

Much appreciated

Tiede-Jan