Great news! We have released official version of 2.0-rc1 release today that includes RPM artifacts as well. You can download the RPM artifacts from Opensearch 2.2.1 · OpenSearch
We are targeting to publish the RPM artifacts for 1.x series from 1.3.2 release scheduled for May 05 2022. We will keep you updated on the progress.
@dinesh you can download the official RPM artifacts now.