Not much. All this really shows is that black Democrats don't show up when the party doesn't try to turn them out (shocker). You saw a similar dynamic in 2022, where black turnout was pretty bad across the South but was decent in Georgia despite being a midterm.
Even in Georgia, Walker outperformed Trump in the black belt despite being a very weak candidate and Warnock being a perfect fit with them, and Kemp/Raffensperger put up numbers way better, with the latter even flipping GA-02.
Not true. Warnock did better than Biden in GA-02.