Plenty of chargers around where I live deliver 208v at 30a, which tells me they're connected to a pair of legs of a 3 phase circuit.
I suppose this means one leg of the circuit is not used, meaning the load between the different legs is always going to be out of balance, but this practice (use 2 legs of a 3 phase feed for "240 er... 208v" for "big" loads such as a drier or EVSE or water heater, so likely any industrial / commercial setting just accepts that you're not going to load up all legs your feeds evenly.
NA built EVs typically don't have the internal circuitry to manage 3 phase charging -- the EV takes care of the AC -> DC conversion on a level 2 circuit, and the extra stuff to do that in NA wouldn't ever be used. The same is true of charging off of 400v AC -- it's super rare and likely not something that's worth engineering to implement.
I suppose this means one leg of the circuit is not used, meaning the load between the different legs is always going to be out of balance, but this practice (use 2 legs of a 3 phase feed for "240 er... 208v" for "big" loads such as a drier or EVSE or water heater, so likely any industrial / commercial setting just accepts that you're not going to load up all legs your feeds evenly.
NA built EVs typically don't have the internal circuitry to manage 3 phase charging -- the EV takes care of the AC -> DC conversion on a level 2 circuit, and the extra stuff to do that in NA wouldn't ever be used. The same is true of charging off of 400v AC -- it's super rare and likely not something that's worth engineering to implement.