Exclusive feature for the new iPad Pro’s vs the old ones is: 2 apps in Split-View + floating Slide Over app

The new iPad Pro’s can have all 3 apps functioning on screen, meanwhile the old iPad Pro’s can have all 3 apps as well...but the Slide Over app hovering above the Split-View apps darkens the area beneath it, trying to tap on the apps behind it dismisses the Slide Over app...

I feel like the original iPad Pro 12.9” could handle this....hmfmf