The NCAA approved a rule change that will keep the clock running after first downs, like in the NFL. Unlike the NFL, however, the clock will still stop after a team converts for a first down in bounds in the final two minutes of the first and second halves.
— Read on lsutigerswire.usatoday.com/2023/04/24/lsu-football-brian-kelly-new-ncaa-clock-rules-first-downs-thoughts/