Welcome! Please see the About page for a little more info on how this works.
https://aws.amazon.com/blogs/aws/new-amazon-dynamodb-continuous-backups-and-point-in-time-recovery-pitr/
Currently Datomic supplies backup/restore capability here:
https://docs.datomic.com/on-prem/backup.html
Dynamo's PITR remains untested for use with Datomic DBs. Implementation of this feature would ensure that using Dynamo's PITR causes no issues on a Datomic DB.