Hi Vijeyanidhi,
Thanks for reaching out. I am one of the release managers for flink 1.18. How can I help you?
Currently we are still waiting for the feedback of some release tests:
https://issues.apache.org/jira/browse/FLINK-32726.
End of Sept is IMHO the solid data like we did for previously releases, since there are many factors that can have impact on the release.