Here's how I would process it, but of course, it comes down to personal taste. Once I opened the NEF in LR, I started with 'camera standard' and tweaked from there. TBH, I thought it looked pretty good before I even did anything. Going by the histogram, exposure seemed reasonable.
I think what you're seeing here is just due to the natural setting and lighting for that time of day. It does have a soft, pastel look, but I kind of like it. I definitely don't think there's anything wrong with your D850. You're shooting RAW, so you have a ton of possibilities. I would definitely use one of the camera calibration profiles as a starting point. I find Adobe Standard kind of bland, but the other profiles will mimic the Nikon "look". Camera neutral is great if you want to do heavy processing, but Standard is a nice starting point (although a bit too contrasty for me sometimes).
Wherever you are, be glad you're not in Ohio! It seems like 90% of the days here this winter have been a constant overcast sky. Talk about unsaturated colors! Anyway, good luck!
