Hi Sid, the Microflow Timer is exactly the widget you need. You can refresh a (non persistent) object with the values you need on your dashboard.
Another option is a Template grid with a refresh timeout; https://docs.mendix.com/refguide6/template-grid#refresh-time-in-seconds
One additional tool you could use is the Database Counter that you'll find in the app store. This widget provides the ability to have key metrics on your page that are refreshed at an interval you determine. The numbers update dynamically and you can specify XPath constraints to control what the counters measure.
Hope that helps,