Your card may not support Freesync, here's old list
Download GPU-Z, use its 'Lookup" button, should give you exact model of your card.
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..