Everything seems to be correct, the audio outputs of any program (according to Patchage) are connected to the Patchage’s “system” box, on the playback_1 and playback_2 inputs.
But there is no onboard sound, only usb.
Also tried with qjackctl, different settings, etc…
Edit:
Make it clear that I don’t use both at the same time. Disconnect the usb to test by the onboard card.