"When you “turn off” Bluetooth on your #iPhone in the Control Center interface, you’re only telling your iPhone to disconnect from any devices to which it is directly connected ... However, the Bluetooth service is still up and running"
https://www.androidauthority.com/psa-toggling-bluetooth-in-iphone-control-center-doesnt-do-what-you-likely-think-3355583/
@lupyuen like it has been for the last 6 years