Unless it's having issues (crashing, BSOD, etc.) there's nothing "wrong" with it, it's just not a great performer.
If you are feeling adventurous you could delid it, maybe the IHS isn't making even contact with the cores.
Or it could just be that those cores require more voltage to achieve the same frequency as the others.
Consider that a 7600X is really a 7700X that failed, they disabled 2 cores and sold it cheaper.
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT