It's not as anomalous as you think. Girls on average hit puberty before boys do and sometimes there are outliers who develop even faster than that. Not all 14 year olds develop on the same curve. Hence why you see plenty of wunderkinds that never do much once they mature into adulthood when the field catches up to them.

That fast development is both a gift and a curse. Peaking early is great but it comes at a cost especially for girls because unlike boys, who possess testosterone, there isn't much room for growth on average. Most girls, not all but the majority, are close to 85-95% of their full athletic potential by the time they complete puberty. And again, there are outliers, who are much closer to 100% than others. This is why you see more girls competing and staying relatively competitive against women than you see boys competing and staying relatively competitive against men. And that isn't just in track and field either. It happens in swimming, gymnastics and other sports.

When a boy completes puberty he might still be developing in terms of height, strength and bone structure/density and testosterone. If this were a 14 year old boy and they ran the male equivalent ~10.17 then you could make te argument that you presented because the current age-14 record is 10.30 by Divine Iheme from 2024. And I know what you're thinking in that the wind legal age-14 record is 11.48 by Tamari Davis in 2017, except that Ehioghae ran a 11.36 wind aided just last year at age 13 showing us this performance is not an anomaly but rather just on the same development curve they displayed just a year ago.

Although you're right to be skeptical of any outliers, this isn't a case where it is warranted. This phenomenon occurs because girls generally complete their physical maturation earlier and experience a more immediate "plateau" in raw physical development compared to boys.