why some packages are missing on F41 ?

Hi, From script find_failures.py I can see these packages aren't in F41 [1] any reason for that ? One user ask me about qTox package and I don't know what to reply ... Best regards, [1] Package: libndi Package: mixxx Package: moc Package: obs-ndi Package: qmmp-plugins-freeworld Package: qtox Package: vcmi -- Sérgio M. B.