Cloned device for 1 Apple product Apple iPad Air

But, it does:

Any additional device would also appear in your Apple ID account (appleid.apple.com).

Anything connected to your Apple ID appears there.

Your device cannot be cloned unless you gave it to someone, they created a backup, and they know your passcode (to access the device), Apple ID and password (to restore it using their own)

It's improbable that your device was "cloned."

Your device cannot be cloned unless you gave it to someone, they created a backup, and they know your passcode (to access the device), Apple ID and password (to restore it using their own). Any additional device would also appear in your Apple ID account (appleid.apple.com).