Private Adoption in the Philippines

Timing and planning is key. My wife was a Philippine citizen when we adopted.....no Hague requirements for Filipino adoptions (in country adoption thru Philippine courts). My wife got her citizenship after the adoption and then we petitioned them as our children....no issues. If the person is a US citizen only, then Hague kicks in. My questions is, "if the uncle holds dual citizenship, can he do the intracountry adoption?" Sounds like a question for an attorney to answer.