System information is showing onboard audio device with driver snd_soc_skl from sof-firmware
Audio: Device-1: Intel Sunrise Point-LP HD Audio vendor: Acer Incorporated ALI
driver: snd_soc_skl v: kernel alternate: snd_hda_intel bus ID: 00:1f.3
But the audio devices are not detected by PulseAudio
The list of modules should have at least one module-alsa-card after module-udev-detect
PulseAudio only creates auto_null (Dummy Output) for audio playback when no hardware output is available to play audio
I suggest you check pulseaudio.service for error messages:
systemctl --user -l --no-pager status pulseaudio*
and check if audio hardware is detected correctly in ALSA
sudo alsa-info.sh --upload