I have configured Debian 12 with Pipewire but I see some components of Pulseaudio.

dpkg -l|grep pulseaudio
ii gstreamer1.0-pulseaudio:amd64 1.22.0-5+deb12u1 amd64 GStreamer plugin for PulseAudio (transitional package)
rc pulseaudio 16.1+dfsg1-2+b1 amd64 PulseAudio sound server
ii pulseaudio-utils 16.1+dfsg1-2+b1 amd64 Command line tools for the PulseAudio sound server
ii xfce4-pulseaudio-plugin:amd64 0.4.5-1 amd64 Xfce4 panel plugin to control pulseaudio

I think i need the last XFCE panel for volume control but do I need the others?

pulseaudio-utils is suggested by pipewire-pulse
pulseaudio is suggested by pulseaudio-utils

So both of those aren't needed and should be able to be removed safely.

Not entirely sure about gstreamer1.0-pulseaudio if that's actually useful anymore or not.