iPad Air 4
How to force close apps (swiping) like I did on the Air 2 (which was double click the Home Button and then swipe)
iPad Air, iPadOS 14
Question marked as
From the bottom edge of the screen, swipe upwards to the centre of the screen - and pause, briefly, before lifting your finger from the screen; this will open the Task Switcher.
You can now manipulate tasks as before.
This method works equally well on iPad models that incorporate a Home Button.