I am working with CoreBluetooth to connect to a BLE device. I want to verify if the device is already paired before performing certain actions. I followed the steps mentioned in this StackOverflow post, but I am facing an issue. Even though my device gets paired successfully, the didWriteValueFor delegate method is not being called.

I want to implement search for Bluetooth devices and advertising when the application is minimized. For example, android devices have Foreground Service to do this work. How can I implement this in iOS? Is it possible?