Good morning. I am a big user of picture controls in my Nikon cameras, whether for pre-processing JPEGs or for setting a good "as shot" starting point in Lightroom. For a long time, I noticed that other Nikon users seemed a little bit clueless when I would try to explain what I was doing and why. Finally, I learned that Picture Control is implemented quite differently on different models across the Nikon product line. For instance, I started with a D200, and have also used a D300, D300s, D500, D810, and D850. None of those cameras have "Scene Modes," although they do come from the factory with a small number of presets which can be edited or used as starting points for other setups.
In these cameras, direct control of parameters like Sharpness, Saturation, Hue, and several others similar to LightRoom sliders can be set directly, then saved with an identifying name. I have deduced from conversations that in cameras like the D750 and D780, setups from the various presets can be adjusted and saved in the "User" spaces. I presume that they can be changed and saved back to their original locations as well. No clue what options are available on entry-level cameras.
My purpose in saying all this is to say that I've found that it is very important to be very clear which Nikon camera is being referenced in discussions about Picture Control. And it is equally important when reading these articles to understand that your camera may handle these adjustments quite differently from the camera being discussed, even if both are Nikons.