The issue with Nvidia cards is that Bethesda had an agreement with AMD for the game dev, so NVIDIA DSLL isn't included. This means NVIDIA cards can't by default take advantage of their full resolution upscaling ability.

I say "by default" because there's already mods that replace AMD FSR with NVIDIA DSLL. I installed DSLL 3.5 and have been running it essentially without issues (very rarely the screen goes black for a second or two). Getting smooth frame rates on my 2070 super, 3440x1440, High settings other than resolution scaling (which I set around 58%, essentially DSLL "balanced").