If your iPad was disabled and can't connect to iTunes, don't worry, you can use Find My iPad to figure out the issue about https://www.ios-unlocker.com/how-to-unlock-disabled-ipad-without-itunes.html.

When your iPad is lost or stolen, you may use Find My iPad to locate, reset, and lock it. Furthermore, it unlocks your locked or disabled iPad by remotely deleting it. Assume you previously activated the feature on your disabled iPad. You may restore the iPad's factory settings without using iTunes by following these steps.
Step 1. From a computer or another device's browser, navigate to iCloud.com/find and sign in with the same Apple ID as your disabled iPad.
Step 2. Select your disabled iPad from the list of All Devices and click the Erase iPad button.
Step 3. Follow the instructions on the screen to restore your iPad to factory settings. The lock screen will thereafter be removed.