Stereo Cue and Main on Android

Is there a way to to CUE and PLAY in STEREO on Android with just a usb soundcard?
I am using a Nokia 7 plus and Android 9.

Audio output via a usb works but i cant find any option to set the cue device.

If it does not work this way, what is necessary? What do these controller do on the inside?

Audio ou


Thank you for getting in touch. 
You can play and cue in stereo on djay for Android with all supported controllers which you can find on our hardware site:

Thank you for your answer.

Whats on the inside of these controllers?

If they just do a mix-up of a mono signal, i am not going to spend this much money.
Is it planned to support just any soundcard?