Now that the Camaro is a legitimate world-class sports car, it should come as no surprise that GM wants to make it as quick and capable as possible on a race track. And while there's no doubt a manual gearbox is the more involving experience for the driver, automatics these days are simply faster, more consistent, and more precise than any human-operated transmission.
https://www.hagerty.com/media/news/2019-camaro-zl1-1le-offers-automatic/