If your iPad says it's disabled, you'll need to connect it to iTunes or Finder to restore it. The exact steps will depend on ...
You can use split screen on an iPad to view multiple apps at once and multitask with features like Split View and Slide Over.
Disable multitasking settings on iPadOS 17 and above in Settings under Multitasking & Gestures. Multitasking features like Split View and Slide Over or Stage Manager can be enabled and then disabled ...