Can anybody explain Florida book bans to me?

I came across a National Review article today that references a Florida list of over 700 books that are no longer allowed, or will no longer be added, to the libraries in their public schools. This was ordered at the state level.

Part 1) Why are these decisions not made at the municipal level?

Part 2) I feel like, as a parent, I have more freedom to choose what my child reads when my child has more materials to choose from. Can someone explain how this is not an authoritarian approach to parental choice?

To be clear, I’m not here to talk about the semantics of what a “ban” really is. If the intent is to deliberately limit access in any way, at the very least, you are shadow banning.