That sounds kinda weird to me tbh....First, I do not see what the reason would be, since bringing a car to a garage cost VW more money than doing an OTA update. Second, the changes that have to be made to the car's systems in the wake of that seem to be a good reason to not do this.
So, pretty much the only thing I could imagine is that VW really needed to get the ID.3 to the customers, and they actually had to walk down that road. Still, it seems strange. Why don't you get your car to a VW dealer and confirm whatever the truth is?
Thank you. They do not know nothing about this update to 130 kW DC.