There is definitely banding in not only the sky but the clouds, as well. That could be the result of the color profile used during processing.
Retired CPO wrote:
Welcome back and congrats on the new D850! I've had mine for almost a year and I'm a happy camper. I'm getting the best photographs of my life. I would like to take some of the credit but what a camera!
I'm seeing some banding in the sky in your photograph. Not sure what's going on and no one else is commenting on it so maybe it's just me? I hope my monitor isn't headed for a cliff.