As a pizza delivery driver, your pizza shop is your base and you only go out when there's an order that needs to be delivered. My friend used to work at Pizza Hut and he was getting reimbursed for gas (per mile but it was slightly more than his gas mileage so i suppose it covers for wear and tear?).
As far as i know, you're not getting reimbursed for delivering DoorDash and the pickup location could be on the other side of the town.