Replication between two clusters

I am working with Kubernetes for the first time and I need help.

We have two Kubernetes clusters (main and DRS sides), each has 2 PostgreSQL servers (master and slave), and my mission is to create a replication between the main and DRS sides, from one master server to another.
Is there any native tool of Kubernetes or another way to implement this task?
P.S. Sorry if such topic already exists, I really need help, please give some advice.
Thank you.