Here's how to find your lost AirPods using your iPhone or another iOS or iPadOS device with Find My enabled.
The Find My feature must be enabled on your iOS device before you lose your AirPods. There’s no way to turn it on after you’ve lost a device. When you set up Find My on an iPhone, iPad, or iPod touch that you use with your paired AirPods, the feature is automatically enabled for your AirPods, too.
Open the pre-installed Find My app on your iOS device.