Pulse and PipeWire are both running. Try having PipeWire running instead of Pulse. Go to Garuda Welcome → Garuda Assistant → System Components tab. Uncheck PulseAudio. Hit Apply. Reboot.
If doing that doesn’t fix this issue, you might have the same issue as in this thread on top of all that: Update and no audio devices found (currently unresolved at the time of this post)