Hi and welcome!
If you are asking why the RAW Processing adjustment is not affected by Auto Enhance, that is normal behavior. Auto Enhance examines the image for many characteristics, one of which is over exposure. When it detects that the image is overexposed (has many pixels that are greater than 1.0), then it uses features of the RAW Processing adjustment to correct the overexposure. However, for well exposed (or underexposed) images, it tends not to do anything with the RAW Processing adjustment. That said, it could be smarter about underexposure, and could move the black point slider – I’ll make a note of that.
–Nik