AWS Graviton3-based R7g database instances are now generally available for Amazon Aurora with PostgreSQL compatibility and Amazon Aurora with MySQL compatibility in US East (N. Virginia, Ohio), US West (Oregon), and Europe (Ireland) regions. Graviton3 instances provide up to 30% performance improvement and up to 20% price-performance improvement over Graviton2 instances for Aurora depending on database engine, version, and workload.
Source:: Amazon AWS