Audit logging on Azure Database for PostgreSQL – Hyperscale (Citus) via pgAudit is now available in public preview. Produce audit logs of events on all or some nodes in your Hyperscale (Citus) server group including writes, reads, role changes, and Data Definition Language (DDL) with the PostgreSQL audit extension. Detailed session and/or object audit logging is provided using the standard Postgres logging facility. Postgres logs can be saved to a storage account, sent to Event Hub, or queried in Azure Monitor Logs.
Learn more by reading the Audit logging in Azure Database for PostgreSQL - Hyperscale (Citus) documentation.