you could check with nut-scanner -U in shell which driver it expects. If it's a generic ups driver like "usbhid-ups" you can use any available driver from the drop down menu
That one is really not included, but i found a website that states that it could be compatible with the nutdrv_qx driver which is included in truenas scale. The First driver in the list i found was "Atlantis Land ups 2 Hostpower851 (A03-HP851) USB (nutdrv_qx)" maybe give this one a try
you'd have to use the shell and use the upsc command
example: upsc upsuser@localhost should give you an output of the ups's status. obviously replace upsuser with the user you set up.