Hi @Syam Kumar , the recording feature is in public preview, and you do not need to submit for private preview to be able to download the recording. We have a working sample here public-preview which you can use as starting point.
Once the recording is ready, did you check your event metrices in Azure portal? Did you see the event there?
You can access the metrices in Azure portal by: Select your Azure Communication Services resource --> select Events blade and you should see events there
Also, it will be great if you can try to delete the already existing event and try to recreate it.