Jailbroken?
How do I find out if my iPad has been jailbroken? And if so, how do I repair that?
iPad Air 3, iPadOS 15
Unless you have consciously attempted to do, or you have acquired a previously used iPad from somebody else who may have themselves attempted to jailbreak the iPad, you should have no reason to presume that the device is jailbroken.
If your iPad has recently been successfully updated to iPadOS 15.7, your iPad will not be running a jailbroken version of iPadOS.