AWS Backup for s3 - Copy to another account

Question

I'm attempting to use AWS backup to send an s3 backup from one account to another. I've setup all the requirements and backups in my source account are working fine. The issue comes when copying to another account. Looking at this guide there is no mention of this functionality being a limitation. My backup rule includes the copy step, however when the plan is triggered the copy never happens or provides any indication if there was an error.

If I try to manually kick off a backup and copy to another account the option is greyed out.

I've attempted to copy a snapshot and continuous backup, neither work. I'm guessing this is due to how s3 backups work? I've tested with Dynamo and the copy feature works fine.

Answer 1

Found an answer here, looks like it's not supported.