To make sure you are set for this, here is what you need to do: Make sure you have updated your iPhone to iOS 18.2, open Find My app, find your missing item listed and tap on it, then tap to 'Share Item Location'. This will give you a webpage that you can share the link for with the airline.
One traveler praised the AirTag as 'one of the most useful additions' to their travel packing list, highlighting its ability to ease anxiety at baggage claims.