oil

It’s right there, in the first paragraph. How did the writers miss it?

One important fact that the article author left out of their article that might have cleared up the confusion:

"Oil generates a very small amount of electricity in the United States, totaling about 16 billion kilowatt-hours (kWh) or roughly 0.4% of the nation's total utility-scale electricity generation." source

So (in the USA anyway) increases in oil costs don't have a substantive increase in the price of electricity. So to confirm the headline accuracy, Iran war (and the subsequent increase in oil prices) isn't increasing electricity prices in the USA.