Attacking that column would require air attack assets, like A-10s, which they do not have, they have air defense apparently, some S-300 systems and some fighters still operational apparently, but so does Russia. And the column apparently is not moving. One report stated that the head of the column had been taken out, perhaps by Javelins, so it can't move and it's muddy off road.
I don't know what is meant by if Ukraine didn't arm themselves at a national military level.