Uh, no they don’t. I don’t know where you get your information or what state you live in.
Delivery drivers are paid minimum wage at least and places like PH, Dominoes, etc. pay them a small price per delivery - usually around .55 to $1.00.
Tips are a plus. In the late 1970’s and early 1980’s no one tipped delivery drivers. I drove for and managed the biggest PH delivery store in a college town. We kept a list of address in the back of places that did tip because it was rare. But then in those days pizza cost a lot more than today. A large, deep pan Supreme would run you $22 or more.
If they only made tips today there wouldn’t be any since you, on average, only deliver about 4-5 per hour even in a 2 mile radius delivery zone.
The standard when I worked was this.
20 deliveries a day.
4 dollars base delivery fee + tips.
Average driving distance was 50 miles a day.
Average tips were about 2 dollars per delivery, so we made about 120 dollars in an 8 hour day. so roughly 12 dollars an hour.
I delivered Chinese food in 1965. I was paid minimum wage of about $1.30 per hour plus tips. The tips would generally make up about one third of my total pay.
You get to be pretty good at fumbling with change in order to maximize tips. You carry a lot of one dollar bills. You don't want to hand a customer 35 cents plus a five dollar bill in change unless you really want a 35 cent tip.
The total purchase price was key to getting a good tip.
It was terrible if the total bill was $9.35. You're getting a 65 cent tip. Much better if the bill was $8.70. Then you got $1.30, twice as much.