ODBC Driver installation

Yes, Amazon RDS allows the installation of third-party ODBC drivers, as long as they are compatible with the version of the database engine and the operating system that you are using.

To install a third-party ODBC driver, you can use the Amazon RDS option group feature. An option group is a collection of options that can be applied to a DB instance. To use a third-party ODBC driver, you can create a new option group and then add the ODBC driver as a custom option. You can then associate the option group with your DB instance. https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-custom.html

Before installing any third-party ODBC driver on your Amazon RDS instance, you should carefully review the licensing terms and compatibility requirements of the driver. Additionally, you should test the driver thoroughly before using it in a production environment to ensure that it works as expected and does not negatively impact the performance or stability of your DB instance. It's best though to stick with standard fully-managed RDS if you can, it's likely to result in lower TCO.