This does seem “off” somewhat. I have similar configuration (RTX3080 10GB, Ryzen 7 3700X, 32GB of RAM), running a 32" 4K monitor at 100% 4K scaling, essentially all Ultra, 200 terrain and object LOD. I had not flown around NY recently but after seeing this I did a quick flight. I turned on the GeForce Experience FPS indication to see what it looked like.
I still find it disappointing that the forum no longer allows 4K images so these images are 4K resized to HD. Frame rate is shown on the bottom left of the screen. First off: at 2,500ft:
Then descended to 1.500ft:
Frame rates are generally in the mid 40’s with one at 38FPS. I then landed at La Guardia and the frame rate definitely dropped badly to 22 - 24 FPS near the terminal. Rather surprising because the terminal is not all that detailed and I do not see a similar drop at for instance the VERY detailed CYVR Vancouver by FSimStudios.
Taking the drone camera bit higher restored the frame rate
And FWIW I consider the base NY photogrammetry scenery to be very nice indeed.