As documentations stands the cross-region Automated Backup(PITR) is not supported neither in AWS RDS Console or AWS Backup for MySQL databases.
What's more, I observed, that AWS Backup is confusing, because when marked
Enable continuous backups for point-in-time-recovery AND
Copy to destination region indicated, AWS Backup does ONLY regular cross-region snapshots. What is misleading, because
Enable continuous backups for point-in-time-recovery is marked, so PITR are expected. It would be nice if someone can confirm my observations.
You can configure your Amazon RDS database instance to replicate snapshots and transaction logs to a destination AWS Region of your choice. If this is what you are looking for, then here is the guide - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReplicateBackups.html
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