https://arstechnica.com/gadgets/2019/09/ipados-on-the-ipad-air-2-old-tablets-can-still-learn-new-tricks/

Starting today, iPads run something called “iPadOS” rather than iOS, but the change has more to do with branding than functionality. Apple’s tablets might get a few more keyboard shortcuts and some multitasking features; maybe they’ll diverge more in the future. But for right now, iPadOS is still fundamentally iOS.