Gas taxes are about half of what they’re supposed to be to find road maintenance. The rest is subsidized out of general fund revenues.
Re: maintenance costs every reputable analyst says that EVs are significantly cheaper throughout the entire lifetime of the vehicle, even when you factor in the higher tire wear and tear. That doesn’t factor in the disruption cost of having to get service, either, which adds up with every extra visit unless you live next to the repair shop.
Finally, yes, insurance covers some costs but you’re paying money into that pool. Everyone I know has been complaining about premiums going up due to thefts disproportionately affecting ICE vehicles and a lot of people have been paying money out of pocket trying to harden popular targets like Priuses because parts were in short supply.