When checking some official mirrors on GitHub, some repos have the “mirrored from” annotation, for example https://github.com/aosp-mirror/platform_frameworks_base shows “mirrored from https://android.googlesource.com/platform/frameworks/base.git” below the repo name “aosp-mirror/platform_frameworks_base”.
Some mirrored repo on the other hand, like the Qt mirrors and KDE mirrors, does not. (e.g. https://github.com/qt/qtbase)
Is it something that the repo owner have to ask GitHub staffs to add manually?