AirTag not showing up in Find My
The air tag made the initial tinkle sound, then paired, named, and clicked on paired.
iPhone 13
The air tag made the initial tinkle sound, then paired, named, and clicked on paired.
iPhone 13
Try resetting it, and then, try to pair it again. Be sure that your iPhone has a good Internet connection to be able to access you iCloud / Apple ID account when doing the pairing.
Ref: How to reset your AirTag - Apple Support
AirTag not showing up in Find My