Correct. The capabilities have been added to the CCS car charging standard and some vehicle models support it, but so far as I'm aware no utility has actually yet figured out a plan to use it (much less how much it might potentially rebate/subsidize charging in cases where it would be used).

It's the usual sort of bootstrapping hurdle that a lot of the "user interface" of it probably can't be well developed until there's a general demand for it, and there won't be a general demand for it from the Utility side until there's maybe a larger installed base of vehicles with the capability.

But, the interesting part is still pointing out that plenty of people are already thinking about it, and it is a somewhat exciting part of the equation of how more electric vehicles potentially better balance the electric grid more so than "destabilize" it or hugely increase peak demand. (Because not only are they capable of smartly arranging their charge times to off-peak demand times, but also are giant roving batteries that can themselves act as temporary storage buffers for the grid.)