Amazon Aurora with PostgreSQL Compatibility for PostgreSQL 11 is available in all commercial AWS Regions
Following the November 26, 2019 announcement of the availability of PostgreSQL 11 support with Amazon Aurora with PostgreSQL compatibility in six AWS Regions, we have expanded availability to all commercial AWS Regions that support Aurora PostgreSQL. PostgreSQL 11 includes major improvements to partitioning, improvements to parallelism, and many other useful performance improvements like adding columns with a non-null column default faster. This version includes SQL stored procedures that allow embedded transactions within a procedure.
Source:: Amazon AWS