You can perform a Frequent Recovery Point (FRP) backup operation in a Database Availability Group (DAG) by connecting either to the DAG or to a member server.
When you connect to the DAG, the Frequent Recovery Point backup operation creates FRP backups on all member servers in the DAG. You can create FRP backup for either active or passive databases, or for all databases on a specified member server, or on all member servers in the DAG.
Each server has its own FRP backup, independent of other member servers in the DAG.