DDJ-REV7: Option to Route PHONES / Cue Output via USB

It would be nice to be able to output the PHONES / Cue Output via USB so I can in my practice setup. I use Virtual ASIO Devices and a Focusrite 18i20 and I when practicing remotely with fellow DJs I need to wear only one headset (to be able to listen to them as well as the mix) so I need the CUE output via USB. At the moment I connect a cable to route it via Focusrite, but having this option via USB would be so much more convinient.