Hi @Substring I have same issue but mine does show on the list:
0 [ALSA ]: bcm2835_alsa - bcm2835 ALSA
bcm2835 ALSA
1 [Set ]: USB-Audio - C-Media USB Headphone Set
C-Media USB Headphone Set at usb-20980000.usb-1.2.1, full speed
Still switching HDMI/Jack/Auto wont output any sound.
