Someone said have a model knob invisible underneath and a view knob/control actually taking the mouse input and mimicing the knob behavior. but I can't seem to figure out or find anything about how to transfer the info between the two especially on reading automation

The script control's plugin parameter (ScriptedControlAudioParameter) is a juce::AudioProcessorParameter, so it already has beginChangeGesture()/endChangeGesture(). What's missing is only a script-accessible entry point that calls them. A visible HiSlider already does this on drag (MacroControlledComponents.cpp:735/752); HISEScript has no equivalent.