the only means of communication the airtags has is bluetooth
same as wireless headsets and computer mice and keyboards and mobile phones
you can read more about bluetooth emf here
Is Bluetooth Dangerous? - Get the facts from EMF Protection Experts (emf-protection.co.uk)
Are Bluetooth Headphones Dangerous? (healthline.com)
Is Using Bluetooth Wireless Headphones Bad for Your Brain? (health.com)
more
bluetooth emf - Google-
but mind you, depending on where you live in the world then you have grown up surrounded by emf from the FM radio signals and tv broadcast signals which transmit with much much much higher watt than the
bluetooths
-20 dBm (0.01 mW) to +20 dBm (100 mW).
m being milli
as a Amateur radio operator I'm allowed to transmit radio at 100Watt as in 1000 times stronger emf than the bluetooth signals, and public broadcast tv and fm radio broadcast several 1000s stronger still