Since Bluetooth is present in Device Manager and the headset is discoverable by the phone, the remaining Windows 11 checks most likely to help are these:
- Make sure the headset is in pairing mode the entire time the PC is searching.
- Open Start > Settings > Bluetooth & devices.
- Confirm Bluetooth is on.
- Put the headset back into pairing mode, then keep it close to the PC.
- Change Bluetooth discovery to Advanced.
- Go to Start > Settings > Bluetooth & devices > Devices.
- Under Device settings > Bluetooth devices discovery, change it from Default to Advanced.
- Try scanning again.
- Remove any previous Bluetooth entry for the headset and add it again.
- In Start > Settings > Bluetooth & devices > Devices, look for any existing entry for the headset.
- Select More options (...) > Remove device.
- Then select Add device and try pairing again.
- Check that Airplane mode is off.
- Select the Network, Sound, or Battery icons on the right side of the taskbar.
- Verify Airplane mode is turned off.
- Run the Bluetooth troubleshooter.
- Go to Start > Settings > System > Troubleshoot > Other troubleshooters.
- Next to Bluetooth, select Run.
- Update the Bluetooth adapter driver again using Device Manager search.
- Open Device Manager.
- Expand Bluetooth.
- Right-click the Bluetooth adapter and select Update driver > Search automatically for updated driver software.
- Restart if prompted.
- If that still fails, install the latest Bluetooth driver from the PC or motherboard manufacturer.
- Windows may be using a generic or incompatible driver.
- Manufacturer-provided Bluetooth drivers are specifically called out as important when connection problems continue.
- If the headset still does not appear, verify the PC hardware and Bluetooth support.
- Microsoft notes that if Bluetooth is missing or hardware is malfunctioning, the PC manufacturer may need to provide model-specific troubleshooting or drivers.
The most relevant missed step here is usually changing Bluetooth device discovery to Advanced. That is specifically recommended when a Bluetooth device does not appear in the list.