duplicate category with all its children and data

Hello,

I am searching for existing APIs for below requirements :-

1. API call to get community structure: categories and boards in single call

2. Creating structure via API (duplicate category with settings and configuration )

3. Duplicate an activity including its settings and configuration.
4. Duplicate a category including its settings, configuration and activities.
5. Create multiple copies of a category or an activity

Is there any API to get/set admin settings/configurations for a node?

Let me know if anyone is aware.

Thank you,

Vaishnavi