The actual issue was that this athlete, Imane Khelif, is male. And was competing in a women's boxing match, despite having previously been deemed ineligible by the International Boxing Association for this reason, after a karyotype test revealed XY chromosomes.
The problem is that women's boxing in the Olympics doesn't verify sex other than via identity documents such as passports. Even though the other categorical attribute - weight - is directly verified during competition.
As Khelif (and another male boxer, Lin) had a female passport, this permitted competition in the tournament despite the fact that it enabled a male to pummel female boxers, to an eventual unanimous victory.
Obviously, many people are against this, for the same reason as why mixed-sex boxing tournaments aren't considered acceptable, for reasons of fairness and safety.
The problem is that women's boxing in the Olympics doesn't verify sex other than via identity documents such as passports. Even though the other categorical attribute - weight - is directly verified during competition.
As Khelif (and another male boxer, Lin) had a female passport, this permitted competition in the tournament despite the fact that it enabled a male to pummel female boxers, to an eventual unanimous victory.
Obviously, many people are against this, for the same reason as why mixed-sex boxing tournaments aren't considered acceptable, for reasons of fairness and safety.