Or perhaps I asked because I did look and didn't find anything "well documented" about Thomas throwing that race and was wondering where you got that claim.
Within swimming there is discussion about the degree to which Thomas is "sandbagging" eg
https://www.outkick.com/remember-those-lia-thomas-trans-race-collusion-accusations-back-in-january/
John Lohn, editor in chief at Swimming World, noted in a Monday morning column that he believes Thomas was “sandbagging” in the 200 and 500 freestyle races and that it was “likely designed to draw less attention to her performances.”
ESPN+ swimming analyst Adam Giardino noted how during Thursday’s 500 freestyle preliminaries Thomas’ legs were barely used as the biological female opponents were kicking like crazy to generate power.