If I want to get audio through xrdp, I have to build it myself. That is not a acceptable solution for regular users. Users should simply install it from package manager.

I completely agree but it's up to each distro team right now. They should able to do that much better than us.

I'm also a FreeBSD developer and quite familiar with creating FreeBSD packages, so I create and maintain PulseAudio module of xrdp. To create packages for other OS, we xrdp community need such packaging experts like me of FreeBSD.

Due to human resources constraints, we release source only. We always welcome any kinds of contributions.

Indeed, i've try 2 install following the exact command from a centos 7.7 with xfce, and xrdp working.. but the audio give error along the way and while it give : pulaudio v10 bbeing install.. The volume conrtol in xfce, only show Dummy output. From pulseaudio volume control... So don't know what to do after that... ? thanks

i did install all the command, in a root ssh login.

details:

with like the 3 last command
it said : libtool: warning : relinking 'module-mmkdb-evdev.la ... and other module. like for around 40-50..

near the end :
with : cd pulseaudio-module-xrdp [root@c999945779-cloudpro-905586277 pulseaudio-module-xrdp]# ./bootstrap && ./configure PULSE_DIR=~/rpmbuild/BUILD/pulseaudio-10.0 autoreconf: Entering directory .'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
aclocal: warning: couldn't open directory 'm4': No such file or directory
autoreconf: configure.ac: tracing
autoreconf: configure.ac: creating directory build-aux
autoreconf: running: libtoolize --copy --force
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, build-aux'. libtoolize: copying file build-aux/ltmain.sh'
libtoolize: putting macros in m4'. libtoolize: copying file m4/libtool.m4'
libtoolize: copying file m4/ltoptions.m4'

For Fedora/CentOS/RHEL, the problem has been listed in the Red Hat Bug Tracker since October 2019 and was assigned to Itamar Reis Peixoto.
https://bugzilla.redhat.com/show_bug.cgi?id=1757616

For now, can pulseaudio-module-xrdp be built with pulseaudio 13.0 ( from Debian Buster packages) already installed?

pulseaudio-module-xrdp requires PulseAudio source to build. Distro packages usually provides only source.

i made a script to auto make a deb for the wired pulse audio headers https://github.com/lnee94/pulseaudio-headers-xrdb

I am operating on CentOS 7.7 system.
When I execute the command: yumdownloader -- source pulsaudio, it prompts' no source rpm found for pulsaudio-10.0-5. el7.x86_64 '. What can I do to continue？Any help is appreciated.

CentOS 7 is EOL, so it's not generally mirrored in the usual places anymore.

Have you updated your yum repos to point to https://vault.centos.org/ ? That's the only place you'll be able to get source RPMs from now that I'm aware of.