Audio 6 Not recognize

Does your computer see the interface plugged in at all? Is it only Traktor that doesn’t see it?

First thing I would try is to install audio 6 drivers

https://www.native-instruments.com/en/support/downloads/drivers-other-files/

I don’t know if it’s the case, but did you give Full Disk Access to the Audio 6?

Ok. So…if no drivers allows you to install them, I would contact NI support, because this shouldn’t be happening. Open a ticket with your problem and see what they say

https://support.native-instruments.com/hc/en-us/categories/360000053677-Download-Installation

And inside traktor settings it's not listed?

And I found something for you: did you update the Audio 6 firmware with the first link I gave you before?

And I also found something maybe even more pertinent: check if your computer is denying Traktor mic access: this solved the same problem as you have for another user