AWS – Amazon Aurora now supports T4g instances in AWS GovCloud (US) Regions
Amazon Aurora now supports AWS Graviton2-based T4g database instances in the AWS GovCloud (US) Regions. T4g database instances deliver a performance improvement of up to 49% over comparable current generation x86-based database instances. You can launch these database instances when using Amazon Aurora MySQL-Compatible Edition and Amazon Aurora PostgreSQL-Compatible Edition.
Read More for the details.