It is, here: http://archive.ubuntu.com/ubuntu/dists/focal/main/installer-amd64/current/legacy-images/netboot/ http://archive.ubuntu.com/ubuntu/dists/focal/main/

It is, here: http://archive.ubuntu.com/ubuntu/dists/focal/main/installer-amd64/current/legacy-images/netboot/ http://archive.ubuntu.com/ubuntu/dists/focal/main/installer-...