When the Delivery Partner arrives at the delivery address, they attempt to contact the customer. The Uber Eats app also notifies the customer of these attempted communications. The Delivery Partner also waits for a reasonable amount of time at the delivery address.
If the Delivery Partner is unable to deliver the order, the Uber Eats app provides a notification of the attempted delivery that wasn't completed successfully. All these contact attempts will appear in the Uber Eats app.
If a Delivery Partner isn't able to deliver your order in these circumstances, you are charged for the order.