Placing AirTags in luggage gives you a sense of control -- a false sense of control, it turns out.
We flew Sunday and Monday from San Francisco to Dallas, Dallas to Madrid, then Madrid to Marrakech. We booked all flights through American Airlines, but the final two legs were served by the Spanish airline, Iberia.
American transferred our four bags in Dallas, but Iberia loaded only three of them, leaving one in Dallas. I know this because I have an AirTag in each of our suitcases.
When we called Iberia, they gave us a 900 number to call, and implied that it was an Iberian number. When we called, we learned that it was in fact the general number number for American Airlines, which has no access to our luggage.
We we called again, Iberia told us that there's nothing they can do; we all have to wait for the airport, somehow. When we offered to tell them exactly where in DFW Terminal D the luggage is, they had no interest, as they have no intention of doing anything about our lost luggage.
And so our AirTags give up up-to-the-minute reports on exactly where our luggage is, the knowledge is useless. It's in the control of Iberian Airlines, which has no intention of delivering our luggage.