during trial period it was there in the list of Gadgets which I wan able to add on different Dashboard(s). Now its not there but these Time Sheet appears in Reports.
Ok, that add-on is no longer automatically available to Cloud as it's being rewritten as a Connect add-on.
See https://confluence.atlassian.com/jirakb/jira-timesheet-reports-and-gadgets-removal-from-jira-cloud-792504481.html for the details and what you can do to get the functions enabled on Cloud.
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