Comment 2 for bug 1777148

There are also many mirrors which the prober detected as lagging:
https://paste.ubuntu.com/p/Mg3hhjRZ99/
Looking at the logs (for instance https://launchpadlibrarian.net/374733940/mirror.squ.edu.om-archive-probe-logfile.txt), it does get 4xx responses.
However, the mirrors are not automatically maked Unofficial, which I believe is what shoud happen.