because obviously developed world economies are going to transition fastest.
That's not necessarily a given.
Developing countries have the advantage of not having an established base. For example, mobile phones took Africa by storm and were available in many places where landlines were not. And with smartphones, for a while Africa was leading in mobile payment systems - exactly because it didn't have the established base the developed world has.
With solar power and batteries dropping in price, solar is an obvious choice for people in developing countries where the power grid is unreliable. Once you have solar power and storage anyways, an EV means independence from oil prices and not having to drive to a petrol station to refill.
EVs are coming down in price rapidly. They might soon be an actual alternative outside the developed world.