I don't remember seeing an actual Fedora Change for either file-trigger enablement or current %sysuser_* macros so I'm not sure it's needed here either?https://fedoraproject.org/wiki/Changes/Adopting_sysusers.d_format
Please create a Change. It will helps to track the progress and
works great as single point to gather the knowledge how to do the
conversion.
-- Miroslav Suchy, RHCA Red Hat, Manager, Packit and CPT, #brno, #fedora-buildsys