The Asian elephant is often called "the world's largest domesticated animal", but they're not actually domesticated. To quote World Animal Protection:
So here's your challenge: have there be truly domesticated elephants in the world.
Elephants are not and have never been domesticated like cats or dogs.
These animals have gone through the process of ‘domestication’ – a socio-biological process that happens over the course of many generations of human-guided breeding.
Most experts agree that to be domesticated, animals must have been selectively bred by humans for at least 12 generations, with offspring from each generation chosen for further breeding based on their desired traits – like strength, size, appearance and behaviour.
The instincts and even anatomy of domesticated animals are significantly different from their wild counterparts. They likely still display natural behaviours, but due to selective breeding they are much easier to handle than wild animals of the same species.
It’s not possible for one individual wild animal to become domesticated within their lifetime.
Throughout the 3,000-year history of humans using elephants, most elephants have been captured from the wild. A few may be first or second generation captive bred, but they are not bred selectively for the traits desirable by humans.
The fact that humans have been using elephants for a long time does not make them domesticated.
So here's your challenge: have there be truly domesticated elephants in the world.