No PulseAudio daemon running, or not running as session daemon

firefox audio works, pavucontrol-qt works, but

  $  pacmd list-sinks
No PulseAudio daemon running, or not running as session daemon.
  $  pgrep -fa pul
2561 /usr/bin/pipewire-pulse
  $

oogling a bit i find: openSUSE:Pipewire - openSUSE Wiki
which still leaves me wondering…
How do i ‘list-sinks’, and will it work to use the results with ‘paplay’?
Screenshot_20221222_175327 about this systme

Yes, pacmd requires the pulseaudio daemon, but you can still use the pactl command (assuming pipewire-pulse is active)…

pactl list sinks

yes

Yes, paplay will use pipewire-pulse (PulseAudio-compatible daemon that integrates with the PipeWire media server.)