https://bugzilla.redhat.com/show_bug.cgi?id=1927907
--- Comment #5 from Lukas Slebodnik lslebodn@redhat.com ---
And it's been there about 7 years, so probably nobody remembers the reason anymore.
python3-sssdconfig was never required on rhel7 because it has never been there. python-sssdconfig was required because of authonfig did not want to require it due to "optional" dependency on python-sssdconfig but it was required for proper functionality of authconfig for sssd