That is very strange. As im on UWQHD with weaker hardware and getting 85-115 (outside world boss and some select areas where it drops to 55ish).
Do you know what your ram timings are?
Are you on Windows 11 or 10?
Have you tried different Nvidia drivers?
Anyway biggest killer i think is shadow quality(4) and 'monster/other effects'(1). I drop these to keep frames smooth in places like CL. The numbered brackets are what I set my sliders to.
For reference my hardware. R5 5600, Ram 3200cas14, RX 6800 uses between 45 - 110watts), Windows 10