Employers use W2. That is your first clue that there is no Employer and this person is not an Employee. You can use Door Dash resources, such as:

https://help.doordash.com/dashers/s/article/Common-Dasher-Tax-Questions?language=en_US

That will help. Your taxpayer is acting as an Independent Contractor, using their own tools and resources. That's why you will be putting all the info on a Sched C. That means collecting all their qualifying expense and mileage, as well as the mixed use of that vehicle, and the 1099-NEC might not include tips, but their tax return needs to report all business income.