Hey, Prabhat.
You can use a simple 'filter results' gadget, it's based on a JQL filter, and I assume you have an initial status for created issues(e.g, open) that can be used to get all created issues, then you can choose the "created" column to show. Although, with this, you'll not be able to show the total time it has been open, just the date it was created.
Other than that, you can check if there's an add-on that achieves this, I recommend checking this sumUp for Jira or even ScriptRunner.
And also, since you are talking about time passed since issue creation, you could look into SLAs which can be implemented in Jira Service Desk.
Kind regards,
Maurício Karas
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