To be totally honest, even if there are other problems, it does look like face mites to me and in my opinion she should have treated for face mites first while doing the other treatment. Avian vets know that administering the treatment for scaly face mites, which is one dose of ivermectin applied on the skin between the wings, is all that’s needed to clear up an infection and will not hurt the bird if they do not have mites. “Waiting” to see if she has mites for real is only going to make it worse.