Most do not even have a grievance policy for their members. The National Council is working towards this goal. If you have a problem with one of their member agencies they will try to assist in resolving the issue. An Adoption Agency does not have to be licensed to place children . Only to perform homestudies do they have to be licensed.
Attorneys follow the laws of their profession.
I believe this makes them more accountable than adoption agencies. If you have a problem with an agency I have never seen any state licensing agency do much of anything to assist families to resolve the problem. Any legal recourse will usually depend on the state Attorney General. Or your own lawyer. First Read These articles that will give you insight into questions to ask agencies and how to select an agency.