My crossover EV gets 2.5-3.5 mi/kWh. Call it 3. / $0.2/kWh = 15 mi/$

Avg fuel economy in US ~ 25mpg. At $3.50/gal that's 7 mi/$

So at 20c/kWh, your dollar goes roughly twice as far on electric. California has been seeing brutal rates, though -- 40c/kWh not uncommon.

Californians can play games with Time-of-Use rates (charge at night), get onto EV-specific rates, be on a CCA which tend to not have the try-to-not-burn-down-the-state adjustment fees, get solar +/- NEM2 vs NEM3, etc., so your numbers may vary. And different cars will have different MPG's of course. But all of that is to say, "more expensive to fuel a vehicle with electricity than gas" is not necessarily wrong in California.