Fun to see this here. I had the good fortune of participating in the first match of motorcycle polo in Rwanda back in 2007. This continued on for a while and eventually got a writeup in the NYT: https://www.nytimes.com/2012/05/09/sports/motorized-polo-gai...
I guess the modern day equivalent (technology that’s relatively new, unsafe and unregulated) would be electric scooter polo? I found no sign of a sport like this though.
I think kick scooter polo exists. And bike polo[1] is well known.