To retrieve and restore snapshots from an S3 repository in OpenSearch, follow these steps:Step 1: List Available Snapshots - Use the GET endpoint with the repository name to list all available snapshots.Step 2: Restore a Snapshot - Use the POST endpoint with the repository name, snapshot ID, and index information to restore the desired snapshot.Step 3: Monitor the Restore Process - Check the status of ongoing tasks, including restores, using the GET endpoint with the tasks parameter.