I want to have a more open adoption for my daughter but birth family has withdrawn. What now?

I am an adoptive mom. My husband and I have one daughter. We have not seen her birth mom in years by the birth mom’s choice, not ours. Our daughter who is 6 would like to see her birth mom. She has seen other birth relatives at least once a year her whole life, but this year some of those birth relatives who withdrawn and most will probably not see her again. As things stand right now, her birth grandma still plans to see her this summer. Basically much of the birth relatives do not think open adoption is that good of a thing. My husband and I have very little family and some of our family also do enjoy seeing our daughter or will not see her. I would love to have a more open adoption for her. It is heartbreaking. Has someone else experienced a similar situation?