If you have followed the linked procedure, you will have successfully removed the Activation Lock; you will see the initial “Hello” screen on the iPad, this only being seen on a device awaiting initial set-up.
After preparing the device for a new owner, if you view the list of devices currently associated with your AppleID from another device, the device that you have prepared will not appear in your list:
Settings > [Your Name / AppleID] - scroll down to see your list of registered devices
Likewise, the device that you have prepared for disposal will not be visible from the Find My App - or from the Find My in iCloud when accessed from a web browser:
https://icloud.apple.com