Project maintainers had their projects moved from their public GitHub accounts to the DNF's GitHub Enterprise account without notice. Some maintainers only found out about the transfers of their projects because of this[1] discussion.
Technically speaking it wasn't that discussion. That discussion was opened after we started realizing what had (and had not) happened. But your summary is otherwise correct. :)
So nothing changed with the source code or its licensing, only the location on github? That seems a bit inconsequential, tbh. Are there strings attached to the new location? If no, then move on.
[1] https://github.com/dotnet-foundation/Home/discussions/38