Hi Yash,
I think you might have hit some timezone problems. The events seem to be from "now" (in UTC time). If you are not sitting in UTC+0 time, those events might be "in the future" from your position (since actually Elasticsearch doesn't store the time zone information within the indexed time field). Since you selected "Last 7 days" the time filter will be set to 7 days ago to now, which mean your documents could be excluded.
Could you maybe use the "relative" mode in the timepicker, to set your range from "7 days ago" to "7 days in the future" and check whether that will cause the documents to show up?
If you know that your documents are from a specific timezone, i.e. you want your Kibana to behave like it's in UTC+0 and not your local timezone, you can change that in Management > Advanced Settings using the dateFormat:tz setting.
Cheers,
Tim