…according to a new report in The Hill (which claims that there is still work going on behind the scenes to get KOSA moving again), the real reason is that the GOP has realized that the censorial portions of the bill could be used to suppress their own culture warrioring speech:

https://www.techdirt.com/2024/08/16/republicans-pump-brakes-on-kosa-after-realizing-it-could-censor-them-too/