While increased preload will certainly be a variable, I'd venture a guess that there are travel distance sensors and thus a travel speed calculation which has the most influence on the computer making valving adjustments.
If this is the case, as long as the travel speed is within the acceptable range for the truck, the computer won't care about the increased preload. It will just continue to make adjustments based on the values it picks up from the sensors/calculations. The "static" value really means nothing in this context. Pre-load is how you get additional static height.
Even if the springs are a softer rate, the computer is adjusting valving to maintain the optimum travel speed of the suspension. So again, as long as your spring preload change isn't out of the acceptable range, the computer will continue to chase what it has been told is "perfect" or "correct".
You have to train ai/ml/dl with the correct answer so it can make Inferences for you. No "AI" that I'm aware of in the world can have any beneficial impact if you can't tell it what the correct answer is before it starts crunching data.
I.e.- you have to tell a computer what a dog is before it could tell you whether a picture is of a dog or a cat.
This scenario isn't any different. A group of engineers spent thousands of hours figuring out what the "correct" suspension travel speed should be. The entire live valving system is designed to maintain this "correct" condition and adjusts compression (high-speed and low speed) and possibly rebound to achieve "correct".
I'd also guess that the valving becomes variable rather quickly and calculations are more intense the closer the travel range is to "bump zone".
This is all a theory and hasnt been validated at all, but my company does a fair bit of real-time race analytics for various F1 teams, so I know a little about how the calcs are done.
I'd guess that the adjustment maps aren't hugely different between modes, just a tad more aggressive with adding more valving in the off-road modes.
- edited to add a bit more clarity.