Currently when Products are assigned to Roles at account level in ACC, there is no API which are returning that information.
Roles defined at account level are then assigned to members, which are used at ACC project level.
Modifications to rules at account level (e.g. addition of a product) are not reflected at proj level.
The requested API would enable to create custom automations which can be used to synchronize the modification on roles at account level with members at project level.