The new iPad Air is the first Apple device to have a fingerprint reader under the power button. We
Power button Touch ID on the iPad Air 4 was an 'incredible feat
Leaked manual indicates iPad Air 4 may integrate Touch ID into the power button
Use Touch ID on Mac - Apple Support
Apple iPad Air 2 and iPad Mini 3 - News - What Mobile
Setup basics - Apple Support
Setup basics - Apple Support (MN)
Apple iPad 5th Gen. 32GB, Wi-Fi, 9.7in - Silver - No Touch ID/Fingerprint Sensor 190198239303
How to add or disable Touch ID fingerprints, Apple Pay cards & view transaction history on MacBook Pro - 9to5Mac
New Apple iPad mini 2 image puts Touch ID back on the table (again) - PhoneArena
How to add other people's fingerprints to Touch ID
Touch ID can return to iPhone 12 (thanks iPad Air)