Why is K Value stored on the Printer and Flow Rate on the Filament?

I am confused.

I see that you have activated the ‘pressure advance’.

Hoovertext says the activation overwrites the auto-calibration results.

But where are the results? I looked in the .jason and there is nothing there. Only when I activate pressure advance and enter the value in the filament settings does it appear there.

What does that mean?
It is always printed with K=0.02?
Even if I have carried out an automatic calibration but have not activated pressure advance ?
Do I have to enter the measured value for each coil manually in the settings so that this value is used?
Is it saved in the AMS? In which one, I have 2.

To be honest, I have never had any problems with printing.

X1C, 2x AMS, Orca Slicer 2.0.0