Versions with Amazon RDS Extended Support
RDS Extended Support is available for Aurora MySQL versions 2 and 3, and for Aurora PostgreSQL version 11 and higher. For more information, see Amazon Aurora major versions.
RDS Extended Support is only available on certain minor versions. For more information, see Amazon Aurora minor versions.
RDS Extended Support is only available on Aurora Serverless v2. It isn't available on Aurora Serverless v1.