Has been reported (known issue) for some cpu models.
Option is there for me under Perf. > Tuning.
Do you do clean (factory reset) installs.
Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T..