I suggest you reboot system
and check systemd services for pipewire and pulseaudio
systemctl --user -l --no-pager status pipewire*
systemctl --user -l --no-pager status pulseaudio*
You may need some of these commands to disable pipewire.service and mask pipewire.socket
systemctl --user disable pipewire.socket --now
systemctl --user disable pipewire.service --now
systemctl --user mask pipewire.socket