Data shows Sound Open Firmware driver sof-audio-pci-intel-tgl is already installed to support Intel SST device
Only the metapackage manjaro-pulse package needs to be installed to revert to PulseAudio
The metapackage has Dependencies – pulseaudio pulseaudio-alsa pulseaudio-bluetooth pulseaudio-jack pulseaudio-lirc pulseaudio-rtp pulseaudio-zeroconf
And package manager should offer to install Optional Dependencies – paprefs pasystray pavucontrol pavucontrol-qt pulseaudio-ctl pulseaudio-equalizer
If the systemctl command was effective and system has been reverted to using PulseAudio, the sound servers should look like this:
Sound Server-3: PulseAudio v: 15.0 running: yes
Sound Server-4: PipeWire v: 0.3.38 running: no