Which search criteria yields? - "The NEW" 202 status code in the PPR SANDBOX environment

I want to test the error handling of the 202 status code but I don’t know how to make it show up?

It has to do with this topic:

PPR API Performance Related Updates

Following up from the API Users Group meeting that was held today: The 202 status code is now in the PPR SANDBOX environment and available for users to try out. It will be promoted to production in one month