How old are your chickens? I know when I first brought my 8 week old chicks out to the big coop, most slept on the coop floor. After a few days, some started sleeping on the lower roost at 24 inches. Then a few started sleeping on the upper roost bar at 48 inches and all the others were on the roost at 24 inches off the floor. About a week later, all the chickens were sleeping on the upper roost bar. It was an evolutionary process.
However, they had no alternatives to their roost bars. I noticed that you have steps up to your nest boxes. I only have a perch on the nest box where the chickens can jump up on and then go into the nest box. But the nest box perch is not comfortable enough to sleep on. My nest boxes are 12 inches off the floor, and they don't need any stairs to get to the nest boxes. They just jump up to the perch, go into the box to lay their eggs, and then jump back down into the coop.
I suspect if you have young chicks, then they are just starting to get the idea of roosting on a bar at night, and the steps up to the nest boxes are easy to reach. But, I don't think you want to let them use those steps as a roost, because you might end up having chickens sleeping in the nest boxes at night - and pooping in the nest boxes at night. I would get rid of those steps up to the nest boxes and replace them with a jumping perch. But maybe other people have a different idea. My idea was to eliminate all possible roosts except the bars I wanted them to use. Hence, I have an angled board above my nest boxes so they cannot sleep on top of the boxes.
Interesting. I only have one "Easter Egger", an Ameraucana, and that is just as big as any of my other hens. I am not familiar with small "Easter Eggers" but know that many different breed mixes can be thrown into the definition of Easter Egger.
Anyway, like I said, it looks like you have a very nice setup for your chickens and I hope some of the suggestions that I and others have offered will get you to the place where you want. My suggestions are just based on what has worked for me, but I don't pretend that others may be just as successful with other approaches.
Whatever you decide to do, I hope you post your results and tell us what worked for your chickens. Love to see some pictures of your birds on the roost when you get them trained.