The Auto-Approval step is an additional first step in workflows that's available during trial periods, All Features trial periods, and in Advanced/Premium plans.
In this step, you can enter conditions for the automated approval of requests regardless of any rules specified in other approval steps or workflow settings. If a request meets the criteria stated in the auto-approval step, it will be automatically approved right away.
Here is how to setup auto-approval step.
Feel free to watch our video on How to configure Auto-approvals.