where is the postgresql16-contrib module (repo? module?)

When I do dnf module list - I see.

postgresql 16 [e] client, server [d] [i] PostgreSQL server and client module

What is repo/module that contains postgresql16-contrib component and the syntax to add this component to the postgres install on the OS?

Something like -> "dnf module install postgresql:16/contrib" ?

Where is installing the postgres contrib module documented for postgres 16.