Load management is 50+ year old technology, you don't need a javascript-powered IoT device with NFTs and Blockchain to do it.
The chargers can either do it by themselves (adjust load to match hookup to grid) or the power company can manage it. Usually it's a lot easier just to manage it locally.
Ah yes. That's probably the reason that you "just" need to install a separate substation next to charging stations. Because it's "just" easy with a 50+ year technology.
Ah, we seem to have differing views of what is a "charging station".
You're thinking of the fridge-sized units with the wrist thick black CCS cable. Yes, those need very specific grid hookups.
I'm thinking of, you know, a household plug. The kind an American would plug in their dryer to. You don't need a separate substation to run a dryer, right? Even if an apartment building has 20 of them.
One of those can charge 100-150km of range to a car overnight easily, which is more than the average person drives every day. YMMV.
The chargers can either do it by themselves (adjust load to match hookup to grid) or the power company can manage it. Usually it's a lot easier just to manage it locally.