ipad stolen need to shut down

Here is Apple’s advice for lost or stolen devices:

https://support.apple.com/en-gb/HT201472

https://support.apple.com/en-gb/HT210515

If the Find My iPad feature was enabled prior to it being “misplaced”, then if active, you would stand a good chance of locating it. 

However, if the feature was not activated prior to being misplaced - or the iPad has been inactive for more than 24 hours, the last known location will not be available - and the opportunity to use technical means to recover the iPad have been lost.

If Find My wasn't running on that stolen iPad, then there will be no way to track it nor lock or shut down this iPad remotely.

Sorry.