I wrote advice on how to make this happen before I read the last few lines. The adoption is a done deal, it sounds like.
I would still go to the worker's supervisor and in a calm but firm voice express your sorrow. Perhaps you won't be able to see this family but perhaps you can influence the policy for future children.
I adopted a foster child. I also worked with CSD as a police officer who removed children. I'm really sorry to hear how unfeeling this worker has been. Nearly every worker that I worked with would've found a way for you to meet the adoptive family.
My foster child was placed with me as an at risk adoption, meaning the parental rights hadn't been terminated yet and the plan was for me to adopt. My daughter then had two different caseworkers.
I've reread your post again. I'm confused. Is she to be taken to an adoptive family? Usually that transition is done gradually. Perhaps this is the last visit with her birth mother? Have her parental rights already been terminated or is it now the plan to do so? Or were the parental rights just now terminated. If this is a new termination then there is a whole other process to go thru and Annie will be getting a new caseworker to deal with the adoption even tho the adoptive family has been chosen.
Another idea that I have is for you to ask the caseworker to give the relatives who will be taking her your name and phone number and ask them to give you a call. Write a letter to them, describing your love and care for their soon to be new daughter. Appeal to their goodness.
Please give me more info. I may be able to help you.
Later: I took more time to read your post more carefully. I'm confused. You said they are terminating her birth mother's parental rights but you can't take her to her appointments to be with her birth mother because your bond interferes with her bond with her birth mother. Makes no sense to me. I suggest that you're perhaps not understanding what is happening. Perhaps she will be visiting her relatives and they are wanting to allow her to bond with them.
Later, later. After thinking about this, I think I do understand CSD worker wanting a neutral person to take Anna for goodbye visits with birth mother. Anna needs to be calm when she sees her mother for the last time. The visit needs to be as calm as possible both for Anna's sake as well as her birth mother's. When Anna is already upset by being taken from you she is unable to be a part of the bond that is to be broken with her birth mother. She is upset when she needs to be involved.
Also, it's time for Anna's bond with you to be loosened. Her transition will be easier if she's less dependent on you. It's time for you to let go so that Anna can let go.