- electricity can be generated many different ways

- many generation sources aren't dependent on resupply. Spiking the price of lithium doesn't prevent existing batteries from working, it only makes new ones more expensive. Solar, wind, hydro and nuclear (to a lesser extent)

- electricity supply is heavily regulated, for better or worse.

There’s also an interesting factor in timing and latency of the grid. Peak usage is typically mid afternoon. While least usage is overnight.

There’s essentially excess capacity during the time period that most people charger their car.

Half the oil and gas production comes from an official cartel so it's kind of in the oil sector's DNA with price fixing.

That said for profit electric monopolies are indeed a scourge.