Amazon Aurora with PostgreSQL Compatibility for PostgreSQL 11 is available in AWS GovCloud (US) Regions
Following the April 24, 2020 announcement of the availability of PostgreSQL 11 support with Amazon Aurora with PostgreSQL compatibility in all commercial AWS Regions, we have expanded availability to AWS GovCloud (US) Regions. 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