Unfortunately no Qobuz integration on Kann firmware, and no sideloaded apps support.
I know two methods - one is stacking. Run Qobuz on an android phone, use a USB OTG cable (USB C to mini USB type) to the Kann, which then run in USB DAC mode. This is a bit uncomfortable due to the wiring, orherwise fine.
The other method is running BubbleUPnP app on the android phone, and connect to AK Connect function through wifi which has to be turned on on the Kann. This wifi can even be the wifi hotspot from the phone. The disadvantage is that the BubbleUPnP can not use offline files from Qobuz, and that the AK connect sometimes works fine, sometimes reacts on comands with high delay, sometimes does not want to connect at all.