I don’t condone Doordash but I’ve seen coworkers use an equivalent to Doordash:

• unified and familiar interface
• I can choose my restaurant, it’s not limited to one place
• coupons and stuff, same, unified
• the payment method (debit card in France) is already stored in the application and works out of the box for every place that delivers
• it’s easier if you buy a meal every day for lunch during work, no need to create an account for each restaurant (there are more than a hundred around me)