True, but that's not a limitation of EVs but rather the state of energy production in most countries. An economy that moves towards solar/nuclear/wind will see blanket decreases in emissions across the entire fleet of EVs it supports.

Not to mention that even in the current state of affairs in the US, the emissions are far lower on average. Even in states where production is 60% coal: http://large.stanford.edu/courses/2023/ph240/stafford1/