Seems to be what I was seeking, fyi for others.
https://rhel.pkgs.org/9/epel-x86_64/mailman3-3.3.8-3.el9.noarch.rpm.html

On Saturday, March 9th, 2024 at 8:40 PM, Xeno <xeno@xenomail.us> wrote:
Hello Almalinux Users,
Glad to find you. This lists.almalinux.org is doing what I'm hoping to set up, Listserv on AlmaLinux. Is there a step by step set-up you can share? Or tips on getting it working? After three days of server rebuilds, I'm getting closer. Got LDAP working on AL9, for example, but wonder if there is a better way, like a working package that just installs everything with prompts. Thanks