Here is the definition I found (hope it will help). Value-Enabling ActivitiesActivities or processes that do not, in themselves, meet the criteria of value adding activities, but which must be performed in order to make it possible to perform value adding activities. The activities involved in the development of most software applications are value-enabling activities.
As I understand it, maybe "levier de création de valeur" could be a possible translation. But no relevant reference found.