I too wish I could have a way to lock the suspension at the highest setting ... although not permanently, more of a larger window before it takes over based on speed.
There is a road I travel that starts quite rough and filled with crater sized potholes, some in succession that sets up for a bouncy-castle ride at 10 to 15 MPH for several hundred feet, then the dirt road becomes straight and smooth for about a half mile which is easy to hit 40 to 50 MPH before it turns and becomes another 10 to 15 MPH bouncy-castle ride - yet, the suspension system won't go back to the previous higher ride height on it's own.
Oddly, it will do it if it starts on the "Normal" ride height, then lowers to "Aero", but once I am back at lower speeds, it' will rise back to "Normal". I wish it would go to the "last ride height" after adjusting to Aero for speed.
I had an old Audi AllRoad that went back to last ride height after a lowering for higher speeds. Would love that for this truck.