how do i change the name on my AirPods?

See the following from Change the name of your AirPods - Apple Support

Change the name of your AirPods

1. Wear your AirPods, and make sure they’re connected to your device.
2. Do one of the following:

• • On iPhone, iPad, or iPod touch: Go to Settings  > Bluetooth, then tap  next to your AirPods. Tap the current name, enter a new name, then tap Done.
  • On Mac: Choose Apple menu  > System Preferences, then click Bluetooth. Control-click your AirPods, choose rename, enter a new name, then click Rename.