Jesus, who hurt you? Sarah's race has absolutely nothing to do with the story and contributes nothing to the plot. It's such a minor change. I guess you didn't know that a white man can have a dark-skinned child? Stop being a racist and grow the fuck up.
So anyone who'd expect the character to be his/her original portray is now somehow a racist? Sarah Miller was of European ancestry, and on this show she's African, that's race-swapping. There's tons of race-swapping on Hollywood movies and shows so it's honestly nothing new, though still disappointing.
The Ghost of the Shell movie Hollywood made also race-swapped from a Japanese female to a European actress (Scarlett Johansson).
And another example: Disney's Pinocchio 2022 - The fairy god mother was switched from a blue eyed, blonde European woman to a bald (I mean she is, just look below) African woman.
This isn't "racist" or anything, it's just stating the fact that characters have been race-swapped.
And if you want another example, just look at the new show Velma:
Scooby Doo isn't part of this show and maybe that's for the best as he'd probably be dumbed-down somehow.
P.S. Dragon Ball Evolution also race-swapped Goku and even if Son Goku in that movie had been Chinese or Japanese (could work with either nationality) it'd still be a garbage movie. I watched it dubbed in Japanese and I enjoyed the dub more than the motion picture itself.