This is a tracking bug for Change: Modules for Everyone
For more details, see: https://fedoraproject.org/wiki/Changes/ModulesForEveryone
All Fedora installations will have modular repositories enabled by default, previously available, by default, only to Server Edition.
This bug appears to have been reported against 'rawhide' during the Fedora 29 development cycle.
Changing version to '29'.
The necessary bits of DNF, PackageKit and fedora-repos have landed, so this should all be ready now.
It's not technically a blocker for this change but I'm mentioning it for awareness: