So Divine Eagle is PLAN project not PLAAF?
I am not sure if I understand the question. It is a stratigic system, so it does not belong to any specific branch. Actually I doubt any UAVs being founded and owned by a branch. Each branch may have specific requirement that an UAV may be developed to address that, but there is nothing stop other branch to adopt it if wanted.
I think there is a confusion of US military with Chinese military as usual. In China, the equipment development is planned and financed by equipment development department of CMC seperate from service branches, that means branches put requirement, but not owning it. In contrast, in US each branch has a lot more (but not absolute) say in the budget therefor owns the outcomes more.