Many do - teslas, ford lightnings, Kia ev9, all the GM Ultium stuff (Silverado etc, hummer ev, Cadillacs), and a bunch of others.
Isn’t Tesla V2G just for Cybertruck?
Yes, but last I checked the bidi chargers were proprietary - tied to vehicle manufacturer - which is a huge disincentive. I don't want my home's battery connector locked into a vehicle brand/manufacturer.
Lightnings do (well before they were discontinued)
But given they are NMC chemistry, you probably wouldn't want to cycle them a lot for the grid (or just your home).
You wouldn't have to, to nevertheless provide great benefit to the grid. Look up "TOU billing".
Many do (assuming bidirectional charger), but it’s only 3.6kW max, in most cases