Nonbinary runner Nikki Hiltz makes record time in qualifying for the Paris Olympics
Nonbinary runner Nikki Hiltz makes record time in qualifying for the Paris Olympics

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Nonbinary runner Nikki Hiltz makes record time in qualifying for the Paris Olympics - LGBTQ Nation

I guess I am not sure what record they are setting. This statement seems to imply that at least one other person set a better record (1 American and any number of non Americans).
Hiltz got the US Olympic trials record, not the American record. No one has run faster in the women's 1500 meter at any US Olympic trials.
You're right about the rest. A few non Americans have run faster and only one American has run faster, Shelby Houlihan. Houlihan is currently banned from the sport for a steroid she alleged was consumed while eating contaminated burritos. She won't be allowed to compete again until January 2025.
Contaminated Burritos is a good name for a band though.