Rough math involved: production of a new EV results in between 8-15 tonnes of CO2 emissions, depending on the size of the batteries and vehicle trim.
But let’s aim for somewhere in the middle and take ~12 tonnes as a yardstick.
~12 tonnes of CO2 emissions equates to roughly 1,350 gallons of fuel.
Depending of fuel efficiency, this would equate to between 20k~45k miles.
Feel free to double-check my math in case I did anything wrong, but it does validate that most of these „facts” around EVs are likely FUD spread by fossil fuel aligned sources.
ETA: initially forgot to include CO2 emissions from electricity generation - but this varies wildly based on source (nuclear, hydro & renewables at 0 etc.)