Change the accounts that Bluetooth enabled devices can access
If another Bluetooth enabled device, such as a car kit or watch, supports the Message Access Profile (MAP), the device can
access your text messages (SMS and MMS) and email messages when it's connected to your device.
Swipe down from the top of the screen once using two fingers, or twice using one finger.
If necessary, turn on the switch.
Tap > Advanced.
Turn off any of the switches.