I am no expert on this hardware, and I can’t find out much about it online yet
Archiwiki has some reports about AMD Raven laptops but just mention that audio works with the latest packages
Pulseaudio is not running (alsa-info data confirms this) and must be restored before continuing work on original problem with speakers
suggest uninstall sof-firmware and reinstall pulseaudio-git to clear changes made
and install latest v5.9 kernel
go to Manjaro Settings Manager manjaro-settings-manager -m msm_kernel and click Install
and also remove the home folder configuration for Pulseaudio
rm -r ~/.config/pulse/
reboot
and hope for better ALSA data and working Pulseaudio
Observations from alsa-info data
Onboard analog still only has one speaker output connection
!!ALSA/HDA dmesg
[   10.884149] snd_hda_codec_realtek hdaudioC1D0: autoconfig for ALC285: line_outs=1 (0x17/0x0/0x0/0x0/0x0) type:speaker
[   10.884152] snd_hda_codec_realtek hdaudioC1D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[   10.884154] snd_hda_codec_realtek hdaudioC1D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
Pin configurations in !!HDA-Intel Codec information show this for the ‘working’ speakers
Node 0x17 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
  Pin Default 0x90170180: [Fixed] Speaker at Int N/A
  Connection: 3
     0x02 0x03* 0x06
and is showing a connection to
Node 0x03 [Audio Output] wcaps 0x41d: Stereo Amp-Out
  Control: name="Speaker Playback Volume"
so the most likely un-used connections for retasking
(all shown as Pin Default 0x411111f0: [N/A] Speaker at Ext Rear)
Node 0x16 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
   Connection: 2
     0x02* 0x03
Node 0x1b [Pin Complex] wcaps 0x40058f: Stereo Amp-In Amp-Out
  Connection: 2
     0x02* 0x03
less likely to be these, unless a connection can be made to 0x03 by retasking
Node 0x14 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
  Connection: 1
     0x02
Node 0x1e [Pin Complex] wcaps 0x400501: Stereo
  Connection: 1
     0x06
These have no Connections and appear to be inputs
Node 0x18 [Pin Complex] wcaps 0x40048b: Stereo Amp-In
Node 0x1a [Pin Complex] wcaps 0x40048b: Stereo Amp-In