I found an iPad. How do I get it back to the owner?

I found an iPad along the side of the road. It's cracked unfortunately, but still works. It has a passcode, so all I have is teh serial number. Apple Chat directed me to the Reporting a Lost or Stolen Apple Product, but that has no way to register a found item. Certainly there's a way for me to enter the serial number somewhere, and for Apple to then reach out to the owner of the device - provided it's registered - to contact me about getting back. Any ideas? Thanks!