You can find notifications received to a Bluetooth device, such as a smartwatch or fitness tracker, annoying if you have them associated with your iPhone. Fortunately, there is a way to stop your iPhone from transmitting those notifications. How?
Launch the Settings app on your iPhone first.
Tap “Bluetooth” under Settings.
Tap the name of the Bluetooth device you want to turn off notifications for in the Bluetooth settings. Our example uses a Garmin Fenix 7X, but your device can have a different name.
Turn the switch next to “Share System Notifications” to off in the Bluetooth device’s settings by selecting it.
(If you are unable to view this option, the device may not allow blocking notifications. For more information, visit the website of the device’s maker.)
Then, leave Settings. You won’t see or get iPhone system notifications on your Bluetooth device anymore. Peace at last!