Would it be racist to pass comment on white members of say the Harlem Globetrotters (their first white player was their (short) white Jewish founder, tho he was only in as a sub :-)
The Harlem Globe Trotters are a predominantly black team, and have had three white players on their team.
In a milieu where there’s a predominating of one colour or race then something that breaks the “mould” is worthy of highlighting, I’d say the lady at the South Pole is more a trivia item but she’s a “first” so worthy of mention.
Nothing to do with racism.
I once wrote a sports article where I referenced some “West Indian” spectators a propos of absolutely nothing and while I’d draw the line at branding it “racist” I can see why some were offended (they were black but I had no idea where they were from really)