CMD Q doesn't close the apps in iPad Air

Hi, I have 3rd generation iPad Air with 13.6.1 iOS.

I use the smart keyboard and just like any apple device, there is CMD-Tab and CMD-Q shortcut to "Quit" any opened application.

However, unlike how this command works in mac on desktop or laptop, these apps in iPad still stayed open when I swiped up the screen even if I just used CMD Q and closed all the apps.

Is this some type of bug or is this not supporting shortcut in iPad?