Hi,
This can happen if the Bluetooth device uses a Bluetooth 3.0 radio that is turned off by the manufacturer’s software.
If turning the Bluetooth device off causes your Bluetooth settings to disappear, follow these steps to re-enable your Bluetooth device:
1. Open PC Settings
2. Select Network, and then Airplane mode.
If your Bluetooth device was previously paired, there should be an Enable Bluetooth switch. Switch it to On.