Patroni switchover from primary site to secondary site

we have patroni cluster primary site and secondary site

Primary Site

Node1 - Leader
Node2 - Sync Standby
Node3 - Replica

Secondary Site

Node1 - Standby Leader
Node2 - Replica
Node3 - Replica

need recommendation, what is best way to switch primary site to secondary site with no data loss

Regards / Rizwan