How can I reduce the frequency of automated snapshots in Amazon RDS PostgreSQL?

Hello.

As you know, RDS automatic backups are done daily.
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html

Automated backups occur daily during the preferred backup window. If the backup requires more time than allotted to the backup window, the backup continues after the window ends until it finishes. The backup window can't overlap with the weekly maintenance window for the DB instance or Multi-AZ DB cluster.

Therefore, if you manage RDS backups with AWS Backup, you will be able to change the backup frequency.
As mentioned in the documentation below, when point-in-time recovery is enabled, it is retrieved daily, so I thought I could disable it and configure it to adjust the backup frequency.
https://docs.aws.amazon.com/aws-backup/latest/devguide/point-in-time-recovery.html

You can perform a point-in-time recovery using either AWS Backup or Amazon RDS. For AWS Backup console instructions, see Restoring an Amazon RDS Database. For Amazon RDS instructions, see Restoring a DB Instance to a specified time in the Amazon RDS User Guide. RDS takes snapshots once per day regardless if a backup plan has a frequency for snapshot backups other than once per day.

Greetings, RDS backups are done automatically daily. As Riku^ Mentioned, you can change the frequency.