This is a known problem with all DEs that PipeWire can be enabled and started after an update
Users can either disable and mask Pipewire services to continue using PulseAudio
(KDE dependencies do not allow for uninstalling pipewire)
Or install manjaro-pipewire which includes pw-pulse to replace pulseaudio
also
sof-firmwarepackage should be installed by default
Sound Open Firmware drivers are only required for Intel systems that require Intel® HD Audio Intel® Smart Sound Technology on proprietary OS