We are currently have on our road map this feature for Point-in-Time Restore (PITR) with continuous and on-demand backups. We will update the status here as this feature progresses.
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Is there any ETA?
The ability to rename databases and collections is not currently something that is in our road map.
Currently the way to accomplish this task in Cosmos DB is to create a new collection with the changed name then use bulk exec or change feed to populate it.
Thanks for your request and input on this. We may consider this for a future planning cycle.