Amazon Aurora for PostgreSQL now supports Read Replicas for Amazon RDS for PostgreSQL in AWS GovCloud (US) Regions to simplify database migrations

You can now create Amazon Aurora PostgreSQL read replicas for Amazon RDS for PostgreSQL instances in AWS GovCloud (US) Regions. This helps minimize downtime when migrating live workloads from Amazon RDS for PostgreSQL to Amazon Aurora for PostgreSQL, keeping instances in sync until you’re ready to move your applications and users to Amazon Aurora for PostgreSQL.

Source:: Amazon AWS