He don’t installed the software update
Why they don’t give me the software update in settings
iPad Air 2, iPadOS 13
Question marked as
You are looking in Settings/General/Software Update?
Is your device compatible to update to the new version? See the Apple Support article(s) below.
iOS 14 and iPadOS 14 Compatible Devices
Get help with over-the-air iOS updates
Update – Can’t or can’t restore
Have you tried using iTunes on a computer or Finder if running Catalina to do the update?
Update software on iOS devices in iTunes on Mac
If you see an error when you update or restore your iPhone, iPad, or iPod