Did you check the mic settings as I suggested? It probably needs to be enabled there as well.

On Sounds - Recording Devices - double click it - General tab look at the "Usage" - make sure it is set as "Use this device (enabled).

Do the same on the Playback devices tab.

=====

If needed try this then the above again.

Try this :

Take your mic test online at mictest

Turn OFF the Bluetooth device.

On Computer Start Menu -> Settings -> Devices -> Connected Devices - Add a Device

HOLD the Power Button on the device for 8+ seconds until the BLUE light starts to flash.

Device has entered pairing mode - on computer click "Search for Devices"

Install or update drivers if needed though Windows 10 will have many.

If paired -> Right Click little speaker near clock on lower right -> Playback Devices - set as Default if desired. (You may need to right-click in the box to check Show Disabled and Disconnected devices.)

Or Start - type in --> Sound ...... find at top and click on to get to the same Playback tab

Repeat for Mic on Recording devices.