Are you talking about in motorsport or in regular vehicles?
For the motorsport answer, because aero, weight, and rules. Active suspension has been banned in most racing series for a very long time, and this I feel would definitely be defined as active suspension. Aerodynamically also it’s better for a car to be flat as compared to the road surface, and to keep underfloor aero level with the track while the car tilts would be super complicated and heavy.
In regular cars, there’s just no real benefit you’re going to see, too many things you’d have to change to make it work, and too much complexity that it would add. I mean there is some active suspension in supercars that aims to keep the car more level instead of getting body roll, but to put that in a consumer vehicle would be… Expensive. Leaning into the corners doesn’t get you any advantage when you have flat tires also, if cars used motorcycle style tires then it might as you can have a stickier compound when you lean it over but imagine trying to get tire manufacturers to change completely and go with that as an idea.