I'm not clear on the question. Are you asking if there are USB audio interfaces out there? Yes, of course. There are hundreds, and most have some sort of digital audio connection as well as Analogue. Typical digital audio connections are s/pdif and ADAT. Some also have AES/EBU.is there any audio interface that will go from a usb or other computer interface to a digital audio interface.
But why waste money on a digital interface for your computer when most mixers have the ability to have Dante or Ethersound interfaces which require no interface other than a Ethernet on your computer. That is of course if you're not going the Behringer or 01V96i route.