According to [1] in 2019 61% of the world electricity is produced burning coal and oil. I don't see a reason why this proportion would change to fullfill EV caused demand increase. I'm afraid that even worse - sweeping demand increase will be fullfilled the easiest way - burning oil and gas. Hydro and nuclear are slow to build. Solar... I don't know what is wrong with it but taking into account that it is a lot cheaper to extract (comparing to oil and gas) it is still just 3%.