None of those, really. Just that downplaying successful women doesn't happen as much in sport, and when it does it's not by stating they are men.

If %10 of successful women have ever been downplayed because of their gender (due to unconscious biases for example) vs %1 of successful men, then this is still a handful of examples which nevertheless points to a significant bias.

1. Ok, but where is the data?
2. Sure, it point to the fact that women's success are downplayed. Not that when women are successful they are called men.

I think so, yes.

Quoting from Transgender Woman Athletes and Elite Sport

The biomedical perspective views the physiology of trans women’s bodies as the source of perceived unfairness, with medicalized interventions (such as estrogen supplementation and testosterone suppression) as the resolution. More specifically, this perspective holds that sexual dimorphism between those assigned male at birth (AMAB) and those assigned female at birth (AFAB) is the reason for athletic differences. Testosterone measures and boundaries are typically chosen as defining characteristics of manhood and womanhood in the context of sport and are used as the predominant marker to predict and level sex-related athletic advantage and the means for inclusion criteria. The research findings in the biomedical area are inconclusive. Studies which make conclusions on pre- and post-hormone replacement therapy (HRT) advantage held by trans women athletes have used either cis men or sedentary trans women as proxies for elite trans women athletes. These group references are not only inappropriate for the context but produce conclusions that cannot be applied to elite trans women athletes. Further, there is little scientific understanding about the attributes or properties of HRT, namely testosterone suppression and estrogen supplementation, on the physiology and athletic ability of trans women athletes. This ignores the potential for estrogen supplementation to reduce Lean Body Mass (LBM), and for testosterone suppression to produce holistic health disadvantages.

Quoting from Sport and Transgender People: A Systematic Review of the Literature Relating to Sport Participation and Competitive Sport Policies

Currently, there is no direct or consistent research suggesting transgender female individuals (or male individuals) have an athletic advantage at any stage of their transition (e.g. cross-sex hormones, gender-confirming surgery) and, therefore, competitive sport policies that place restrictions on transgender people need to be considered and potentially revised.

Quoting Scientific American Trans Girls Belong on Girls’ Sports Teams my emphasis

The notion of transgender girls having an unfair advantage comes from the idea that testosterone causes physical changes such as an increase in muscle mass. But transgender girls are not the only girls with high testosterone levels. An estimated 10 percent of women have polycystic ovarian syndrome, which results in elevated testosterone levels. They are not banned from female sports. Transgender girls on puberty blockers, on the other hand, have negligible testosterone levels. Yet these state bills would force them to play with the boys. Plus, the athletic advantage conferred by testosterone is equivocal. As Katrina Karkazis, a senior visiting fellow and expert on testosterone and bioethics at Yale University explains, “Studies of testosterone levels in athletes do not show any clear, consistent relationship between testosterone and athletic performance. Sometimes testosterone is associated with better performance, but other studies show weak links or no links. And yet others show testosterone is associated with worse performance.” The bills’ premises lack scientific validity.

Quoting from UK-transphobe-funded Strength, Power, and Aerobic Capacity of Transgender Athletes my emphasis

Results: In this cohort of athletes, TW had similar testosterone concentration (TW 0.7±0.5 nmol/L, CW 0.9±0.4 nmol/), higher oestrogen (TW 742.4±801.9 pmol/L, CW 336.0±266.3 pmol/L, p=0.045), higher absolute handgrip strength (TW 40.7±6.8 kg, CW 34.2±3.7 kg, p=0.01), lower forced expiratory volume in 1 s:forced vital capacity ratio (TW 0.83±0.07, CW 0.88±0.04, p=0.04), lower relative jump height (TW 0.7±0.2 cm/kg; CW 1.0±0.2 cm/kg, p<0.001) and lower relative V̇O2max (TW 45.1±13.3 mL/kg/min/, CW 54.1±6.0 mL/kg/min, p<0.001) compared with CW athletes. TM had similar testosterone concentration (TM 20.5±5.8 nmol/L, CM 24.8±12.3 nmol/L), lower absolute hand grip strength (TM 38.8±7.5 kg, CM 45.7±6.9 kg, p=0.03) and lower absolute V̇O2max (TM 3635±644 mL/min, CM 4467±641 mL/min p=0.002) than CM.

Conclusion: While longitudinal transitioning studies of transgender athletes are urgently needed, these results should caution against precautionary bans and sport eligibility exclusions that are not based on sport-specific (or sport-relevant) research.

So even those highly motivated to prove trans women are disproportionately advantaged have difficulty tapping it. As for combat sports, don't forget Joe Rogan as well female MMA athletes ended up apologizing to Fallon Fox for all the transphobic BS they had spewed at the time.

What was your point again?

You can take any other boxer, I specifically chose black and "masculine" athletes as examples to show that even race/body type alone was not the determining factor. In these Olympic games you have just Imane's example: how can you call this a trend or make general statements with one case (not even the Taiwanese boxer got attention)?

What do you mean? Comparing the rate at which women are subject to such effects vs men is a worse statistic than saying “but many successful women are not subject to such effects”? If there is a systematic bias towards women’s success being downplayed, you cannot call this an isolated incident of stereotypical bias.

Men don't have a category to which they are wrongfully assigned when they win sports. This is also because men are the higher category in most sports (i.e., higher performers), so it is a parallel that simply doesn't make sense. So yes. It is a worse statistics because men who are victim of gender stereotypes are generally not the ones who excel at sports (men who are called women in general break the masculine stereotype of the muscular and competitive guy - and these unsurprisingly are not characteristics common in elite athletes).

If there is a systematic bias towards women’s success being downplayed

But this was not your claim either. Your claim is that downplaying is done by specifically saying those women are men. The whole point here is on the cause, not the existence of the phenomenon in general.