PostgreSQL is well-supported by its active community. There are more than a dozen mailing lists available, categorized into topics like:PostgreSQL User Groups all over the world, and there is also an active IRC & Slack community.
There are also links to international sites that contain PostgreSQL information in various languages.
People in the PostgreSQL community also contribute to:
|ahsan hadi: Partitioning Improvements in PostgreSQL 13|
|Álvaro Hernández: Beyond jsonb: a generalized, unstructured data type for Postgres|
|John Porvaznik: Avoiding the Pitfalls of BRIN Indexes in Postgres|
|Andrew Dunstan: NSS on Windows for PostgreSQL development|
|Bruce Momjian: Invalid Times|
|Pavel Stehule: plpgsql_check now supports tracing|
|Kaarel Moppel: A quick pg_stat_statements troubleshooting hack|