As I have already said, SEVERAL TIMES ALREADY, there is no price difference between items on Door Dash and instore/restaurant except for the Loblaws grocery store.
These prices are set by the buisness and not Door Dash so your locale may differ but it’s not an issue with Door Dash but the individual vendors.
Another local pizza place is on Door Dash and it is ~1 dollar cheaper per item and free delivery, however you cannot choose your own toppings from thier Door Dash store.
Subway is on there. The prices for everything I get are the same price. Double meat is $4.00 on both apps, extra cheese is $2.00 on both apps.
McDonalds has the same price on their app and on Door Dash for everything I regularly order. Door Dash offers free delivery and has smaller fees.