How can i find my AirPods if i think that someone stole them?

See here: How to find your lost AirPods - Apple Support

Note, that if they are not nearby, you can only see the location when they were connected to the iPhone last.

They have no GPS, and no way to report their location except to the paired iPhone when they are near it.

Yes. They are at the end of the day Headphones there is only so much they can do.