It’s not abandoned property unless the finder doesn’t know who it belongs to.
If the name of the company is on the scooter, it is mislaid property, not abandoned property.
The classic bar exam question on this involves the finder of a bag of money. In one hypothetical, it’s a plain canvas bag. In another, it has the name of a bank on the bag.
When the name is there, you have to give it back. The finder only gets to keep it if after legal notice and a waiting period, the owner fails to reclaim it. In most states there is a statute on this, and most of them require turning the property over to police temporarily.