They already do: Ford has the Mach-E & F-150 Lightning plus a bunch of PHEVs, GM has (had) the Bolt, Stellantis makes a few PHEVs among which one of the the very few cars on the market that can carry 7 passengers on battery power (the Chrysler Pacifica) altough that one is made in Canada, not the US.

Oh, and all of Tesla.