For example, the OnePlus smartphone's device name is displayed for identification purposes when Bluetooth devices are connected or on the network.

The device name can be changed at any time.

Android 10 | OxygenOS 10.0
Change device name -  Open the  Settings
Change device name -  Tap on  About phone
Change device name -  Tap on  Device name
Change device name -  Enter a  name  and tap  OK
  1. Open the Settings
  2. Tap on About phone
  3. Tap on Device name
  4. Enter a name and tap OK

OnePlus Instructions