Tipping 'nudges' are now popping up on DoorDash. If you don't leave a gratuity, you'll hear about it.
(www.businessinsider.com)
i know, that doesn't matter though does it, if you engage with a gig economy it doesn't matter what the tipping system is in your country. your food order is essentially a job that anyone can choose to pick up or not pick up, and because the payment rates are so low from uber and the like they will only take orders with good tips.
so basically, if you don't want to tip, don't engage with gig economy companies. but if you do engage with gig economy companies you have to tip.