lost my ipad

Start here:

Locate a device in Find My on iPad - Apple Support

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

If your iPhone, iPad or iPod touch is lost or stolen – Apple Support

Use the Find My app to locate a lost or stolen device – Apple Support

Step #5 provides guidance for remote erase. You should note that the erase command can only be executed if (a) Find My was enabled prior to loss - and (b) the device has an active WiFi/Cellular data connection with which to receive the erase command. If the device does not have a network connection, the erase command will remain pending until the iPad successfully connects to a network.

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.