China (basically) only has didi. Not much the USA can say here.
Southeast has Grab, and within each country there are at least 2 local competitors (Be, GoJek, Bolt, Line Man, Bluebird, etc). I believe Doordash just bought Deliveroo, making it the only American competitor in SEA.
In Europe, the main players are local food panda / Delivery hero and Just Eat.
India's winning food delivery is Swiggy.
What countries have both the talent to build a food delivery app and the USA is the dominant player?