I have Solus Gnome:

inxi -Aaz
Audio:
Device-1: Intel Sunrise Point-LP HD Audio vendor: ASUSTeK
driver: snd_hda_intel v: kernel bus-ID: 00:1f.3 chip-ID: 8086:9d70
class-ID: 0403
API: ALSA v: k6.4.11-251.current status: kernel-api
tools: alsactl,alsamixer,amixer
Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
Server-2: JACK v: 1.9.22 status: off tools: jack_control
Server-3: PipeWire v: 0.3.78 status: active with: 1: pipewire-pulse
status: active 2: wireplumber status: active tools: pw-cat,pw-cli,wpctl
Server-4: PulseAudio v: 16.1 status: off (using pipewire-pulse)
tools: pacat,pactl

Found a solution, it was this:

user@user ~ $ systemctl --user start pulseaudio

but WITHOUT stopping pipewire-pulse.service.

Then I followed jumpy to make this permanent

$ systemctl --user enable pulseaudio

Thanks everyone!

Yes, but pulseaudio is no longer supported on Solus and the server may be removed in a future package update. It would be better to figure out the root cause of this issue so we can get it fixed before then with PipeWire. It looks like SOF might not be loading your firmware, can you try sudo journalctl -b0 > bad-audio.log and upload it to Pastebin? Paste the link here.

    4 days later
    6 days later

    I have several days of testing behind now and the solution I marked earlier doesn't seem to function consistently. The sounds might work for a while, but then stop working again. This also stalls YouTube video playback on Firefox and Vivaldi without any error message. Incase there's another Intel NUC user out there reading this, I would like to hear whether this sound issue affects your NUC version as well or not?

    16 days later

    I recently bought and installed a new monitor. It connects through USB-C and seems to have solved the sound issues I had with HDMI.

    6 days later

    jp923 Nicely spotted. I indeed had not upgraded to the latest bios. Upgrading solved some issues I was having with the USB-C ports.