You want to extend the Business Object (BO) BusinessPartnerHierarchy via PDI, but this BO is not PSM released.
SAP Hybris Cloud for Customer.
Due to several complexities involved with this BO, it is not possible to release it for PSM usage at the moment.
Currently our developers are evaluating whether this BO can be released or not. In the meantime, our suggestion is that you search for alternate options if this BO is required for a custom development.
custom development, PDI, business partner hierarchy , KBA , LOD-LE-BP-HIE , Business Partner Hierarchy , Product Enhancement