Set up your AirTag using your iPhone, iPad, or iPod touch - Apple
Apple AirTag How To Setup - How To Connect AirTag To iPhone or iPad - Fix Issues Setup AirTag
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
Add an email account - Apple Support
How To Setup AirTags and Connect AirTag To iPhone, iPad or iPod Touch
What to do if you find an AirTag
Add an AirTag to Find My to keep track of personal items - Apple Support
How to set up your new AirTag the right way
What to do if you get an alert that an AirTag, Find My network accessory or set of AirPods is with you – Apple Support (UK)
Sign in with your TV provider - Apple Support
Buy AirTag - Apple