It’s possible that the update process set something, like game mode or HAGS, to a default setting that you hadn’t previously selected.
Alternatively, if you hadn’t updated Windows for quite a while, 24H2 included a performance fix for AMD CPUs. This bit of 24H2, however, had been included in earlier Windows updates, to preclude the need for AMD owners to have to wait for their turn in the 24H2 rollout.