Hello Vignesh,
Can you please describe your question a little more.
I think you are asking if a person can search for issues assigned to a person and add another as CC in an email?
If so then consider an email in an automation rule.
If you just want to be a watcher on the issue then an automation rule as well.
When an issue is created or the assignee is your profile then add me as the watcher or email me if that is needed.
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