This is speculation, but that may not be Sydney’s natural hair. It is a natural style, but not necessarily hers. I remember Robin wore a curly style, but it was a weave or braids. If this isn’t her hair (again, speculation), it’s most likely a wig.
There has been a fair amount of talk here about WOC and “natural” hair, but even that may have it’s limits. I definitely get the impression that not all natural hair would be acceptable.
Now that I think of it, I may remember her from UGA. I’m a season ticket holder for their gymnastics team and I think she was a member of the Dance Dawgs.