Definitely tested as 2 channel buy via the link as ebay fakes do exist as also have one on my desk which looks and feels exactly the same but no scan code on the rear.
But aplay -l it doesn’t list as a Plugable device so pretty obvious and also not 2 channel.
The Plugable is a great device no AGC, but gain and SNR great so use Speex AGC and you have a great simple 2 channel sound card