Lost ipad

In order to see the last location, "Send Last Location" would have to have been turned on in Settings in the phone before it was lost. The description in Settings for that is "Automatically send the location of this phone to Apple when the battery is critically low." The location would not be available if the phone is offline because someone turned it off or because it doesn't have an internet connection, but only if it is off because the battery was low. The additional requirement is that the location is only shown for 24 hours. If all of those conditions are met you would see the last location in Find My iPhone. There is some information on that in https://support.apple.com/en-us/HT204233

Not if it’s been missing and offline for more than 24 hrs. The last known location is only available for 24 hrs. After that has passed, it needs to come back online again to update the location.