Note that last time I tested, going back from manjaro-pipewire to manjaro-pulse wasn’t possible automagically.
[omano@omano-nvme ~]$ sudo pacman -S manjaro-pulse
resolving dependencies...
looking for conflicting packages...
:: manjaro-pulse and manjaro-pipewire are in conflict. Remove manjaro-pipewire? [y/N] y
:: manjaro-pulse and pipewire-pulse are in conflict. Remove pipewire-pulse? [y/N] y
error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'pulseaudio' required by manjaro-pulse
:: unable to satisfy dependency 'pulseaudio-bluetooth' required by manjaro-pulse
:: removing pipewire-pulse breaks dependency 'pulseaudio' required by plasma-pa
:: removing pipewire-pulse breaks dependency 'pulseaudio' required by pulseaudio-ctl
:: removing pipewire-pulse breaks dependency 'pulseaudio' required by rustdesk-bin