E-Golf was not sold as new in Georgia but I have not had any issue with service at two Atlanta area VW dealerships.
Now the main dealer I go to did tell me they only had 1 tech trained to work on E-Golf so if that person was not working they could not schedule service even if they had availability that day. Now I will say this was relayed to me well before the ID.4 started arriving so they may have many more techs trained for EV service now.
Thinking your dealer did not want to pony up the $$$ to send any of the techs for E-Golf training so it is entirely plausible they could not work on them. Who knows.