My AirTag doesn't connect

The main problem that can occur with the AirTag is that it does not connect to the iPhone or any other device through the Find My app. This can happen for different reasons, and therefore, it can have different solutions. The first thing we encourage you to check is if it is the battery, or battery in this case, that is to blame for this disconnection. The Cupertino company, against all odds and to the surprise of many, included a battery inside the AirTag that is responsible for giving it enough energy to function properly. However, this battery has a finite life, so if you suspect that it may have run out, we recommend that you change it and recheck the connection.

All best!

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What happens when you try to connect? What error messages do you see, if any?

Did you follow the steps to reset the AirTag as described in How to reset your AirTag and try again?