Stolen

Work thru these steps:

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

You don’t.

Find my requires the iPad be powered on and connected to a network.

YW.

Keep your fingers crossed.

Even if it’s NOT on a network, FindMy might STILL be able to geo-locate it using Bluetooth and other folk’s Apple devices.

Well, it needs to be powered-up.

Just make sure that you’ve marked it as “Lost” AND added a message on how to reach you.

You never know.

I actually recovered an iPhone “lost” in Las Vegas thru this process.