AirTag

Unfortunately there is no way to provide airport authorities of the location of your AirTag-ed luggage, except what you can tell them from where it appears on the Find My app on your iPhone.

An AirTag that is separated from its "owner" (the iPhone that it was paired with) for an extended length of time (typically around 24 hours) will start beeping. It may be possible for those same authorities to hear it. Alternatly, you can have the AirTag play a sound via the Find My app.

Finally, if you want to provide contact information, if found, you can put the AirTag into Lost Mode, and then, include your phone number and/or email address.

Ref: Mark an AirTag or other item as lost in Find My on iPhone - Apple Support

Your question is not clear.

If you can see a current AirTag location in FindMy … you verbally relay that location to the Authority.

You can’t give them a link to the AirTag if that’s what you’re asking … ?

You're very welcome! I hope you eventually recover your luggage.