Managing AWS RDS credentials

I'm trying to protect a resource (commit to source control), but the "AWS Region" needs to be different in each of the deployments I have, they're all in a different region. Can I fill this property via an environment variable or from Secrets Manager

Hey @Matt_Davidson! I'm not seeing a way to do this at the moment but I've brought it up with the dev team and can report back here about it!

Are each of these separate production instances?