As I read this article https://www.digitalocean.com/blog/announcing-managed-databases-for-postgresql/ I understood that all data at rest and in transit is encrypted. Could somebody provide me with more information about setting up the encryption?

Is the encryption set up by default for my PostgresSQL? If not, is there any tutorial on how to set it up? Is it possible to use at least the AES256 encryption key?

Thank you