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:
|Bruce Momjian: Postgres Marketing|
|Liaqat Andrabi: Migration to PostgreSQL [Webinar]|
|Pavlo Golub: pg_timetable: start-up improvements|
|James Chanco: Getting Started with PostgreSQL Operator 4.3 in OpenShift|
|Anthony Sotolongo León: Generated Columns vs. Triggers in PostgreSQL 12|
|Andreas 'ads' Scherbaum: Kohei Kaigai|
|Hamid Akhtar: Features In PG13 – Deduplication in B-Tree Indexes|