These are the packages that would be merged, in order:

Calculating dependencies... done!
Dependency resolution took 8.84 s.

[ebuild N ] media-libs/webrtc-audio-processing-0.3.1::gentoo USE="-static-libs" ABI_X86="(64) -32 (-x32)" 680 KiB
[ebuild N ] media-libs/speexdsp-1.2.1::gentoo ABI_X86="(64) -32 (-x32)" CPU_FLAGS_X86="sse sse2" 901 KiB
[ebuild R ] media-libs/libpulse-16.1-r2::gentoo USE="X asyncns dbus glib gtk -doc (-selinux) -systemd -test -valgrind" ABI_X86="(64) -32 (-x32)" 1,510 KiB
[ebuild N ] media-plugins/alsa-plugins-1.2.7.1-r1::gentoo USE="mix pulseaudio usb_stream -arcam_av -debug -ffmpeg -jack -libsamplerate -oss -speex" ABI_X86="(64) -32 (-x32)" 400 KiB
[ebuild R ] media-sound/pulseaudio-16.1::gentoo USE="bluetooth glib -daemon -jack -ofono-headset" ABI_X86="(64) -32 (-x32)" 0 KiB
[ebuild R ] media-video/pipewire-0.3.67:0/0.4::gentoo USE="X bluetooth dbus pipewire-alsa readline sound-server ssl -doc -echo-cancel -extra -ffmpeg -flatpak -gsettings -gstreamer -jack-client -jack-sdk -lv2 -modemmanager (-system-service) -systemd -test -v4l -zeroconf" ABI_X86="(64) -32 (-x32)" 0 KiB
[ebuild R ] media-video/wireplumber-0.4.14:0/0.4::gentoo USE="elogind (-system-service) -systemd -test" LUA_SINGLE_TARGET="lua5-4 -lua5-3" 0 KiB
[ebuild N ] media-sound/pulseaudio-daemon-16.1-r6::gentoo USE="X alsa alsa-plugin asyncns bluetooth dbus elogind gdbm glib orc ssl udev webrtc-aec -aptx -equalizer -fftw -gstreamer -jack -ldac -lirc -ofono-headset (-oss) (-selinux) -sox (-system-wide) -systemd -tcpd -test -valgrind -zeroconf" 0 KiB
[blocks B ] media-sound/pulseaudio-daemon ("media-sound/pulseaudio-daemon" is soft blocking media-video/pipewire-0.3.67)
[blocks B ] media-video/pipewire[sound-server(+)] ("media-video/pipewire[sound-server(+)]" is soft blocking media-sound/pulseaudio-daemon-16.1-r6)

Total: 8 packages (4 new, 4 reinstalls), Size of downloads: 3,490 KiB
Conflict: 2 blocks (2 unsatisfied)

• Error: The above package list contains packages which cannot be
• installed at the same time on the same system.

(media-sound/pulseaudio-daemon-16.1-r6:0/0::gentoo, ebuild scheduled for merge) pulled in by
pulseaudio-daemon

(media-video/pipewire-0.3.67:0/0.4::gentoo, ebuild scheduled for merge) pulled in by
>=media-video/pipewire-0.3.65-r1:= required by (media-video/wireplumber-0.4.14:0/0.4::gentoo, ebuild scheduled for merge) USE="elogind (-system-service) -systemd -test" ABI_X86="(64)" LUA_SINGLE_TARGET="lua5-4 -lua5-3"
media-video/pipewire[sound-server(+)] required by (media-libs/libpulse-16.1-r2:0/0::gentoo, ebuild scheduled for merge) USE="X asyncns dbus glib gtk -doc (-selinux) -systemd -test -valgrind" ABI_X86="(64) -32 (-x32)"
pipewire

For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

https://wiki.gentoo.org/wiki/Handbook:X86/Working/Portage#Blocked_packages

• IMPORTANT: 5 news items need reading for repository 'gentoo'.
• Use eselect news read to view new items.