https://wccftech.com/airtags-for-locating-items-only/

With the AirTags, you have the convenience of locating missing items through the use of an iPhone, but if these can be used to search for your belongings, what about your loved ones? To answer that, an Apple VP clearly states that AirTags are meant to do no such thing, but provides an alternative too.

Speaking with Fast Company, Apple’s Vice President of worldwide iPhone product marketing, Kaiann Drance, noted that the AirTags are built with privacy in mind and, as such, cannot be used to locate children. Drance recommends using the Apple Watch’s Family Setup to find them instead. However, if you do strap an AirTag on a pet’s leash with the intention to find them, they would have to be in range.