Hi Frizzlemad and welcome.
I think boredom can be a major issue for chickens and I think all backyard chickeners need to think about how to give their birds some "enrichment" in their lives. After all, we don't want to end up running a backyard battery farm!
Depending how much room you have in the run, you might like to think about adding some new levels - for example a tree stump, log or branch they can hop up and down off. If you have the height you could add a potted shrub - but be aware that bored chickens will probably pull off all its leaves and dig up the roots!
Interesting new foods that they have to work at are also a big hit, although it might take them a while to realise they are food. As Pigeonpie suggested you can hang a bunch of weeds, or a piece of apple, or a cabbage and let them demolish it.
Also think of ways they can get out of each others' line of sight. A plant pot tipped on its side or a board leaning on the side of the run might help.