So, I have done the basic checks. /var/lib/pacman/local does not contain a folder for pulseaudio. pacman -Syy to rebuild the database has not resolved it, and turning everything off and on again has not fixed the problem either. I also tried:
Once full update was complete, ignoring pipewire-pulse, I tried again “pacman -Syyu” and the error I should have received in the first place was revealed.
error: failed to prepare transaction (could not satisfy dependencies)
:: installing pipewire-pulse (1:1.2.3-1) breaks dependency 'pulseaudio' required by pulseaudio-equalizer-ladspa