I did notice that the ivy seemed to have been cut back from the planters at the top of the wall / fence.
I reckon these green walls have the wrong plant though - Clematis armandii grows a few feet a year and is a monster making lots of thick evergreen leaves. People say you should train a Clematis, but my experience with this monster is that is trains you, and once it’s climbed to the top of whatever it is on, it sends a second layer of tendrils draping back down in a nice way.
While we are on the topic of school green walls, here’s Haseltine’s from a week or so ago, coming along, but still got some way to go: