There are over a billion potential AirTag owners, and this number is expected to grow in the future. How come “a billion owners”? Well, Apple’s Find My network, which can help you locate an item even if it’s turned off, is found on iPhone, iPad, and Mac devices that together have a combined install base of 1.7 billion.
The Find My network doesn’t exist in a vacuum, unlike other Apple products. You don’t need to own an AirTag or even an iPhone to be able to interact with other AirTags in the wild.