Dell Peripheral Manager (DPeM) may not detect the Dell wireless headset when connecting it to their computer using Bluetooth connection.
DPeM version 1.7.0 and below does not support Bluetooth for Dell Pro Wireless Headset WL3024 or Dell Pro Premium Wireless ANC Headset WL7024.
Updating to DPeM version 1.7.2 or later on the computer resolves the issue. To download and install DPeM, reference How to Download and Install Dell Drivers.