I think we are in agreement. Because access to the "forked" repository was removed without the consent of the owner of the fork, it is inaccurate for GitHub to

I think we are in agreement. Because access to the "forked" repository was removed without the consent of the owner of the fork, it is inaccurate for GitHub to describe it as a "fork". For clarity, I would also describe the "owner" of the fork as the person who created the fork.