The PostgreSQL minor versions 11.13, 12.8, and 13.4 are now supported in general availability by Azure Database for PostgreSQL - Hyperscale (Citus) and include multiple fixes and minor improvements. These new minor versions are available immediately on all newly created Hyperscale (Citus) server groups in all supported regions and will be delivered as a part of the next scheduled maintenance to the existing server groups.
Learn more about this announcement and see supported regions where Azure Database for PostgreSQL - Hyperscale (Citus) is available.