CSM could probably be in Young Jump, tbh. Aren't they struggling to find new successful series?
Every manga could be in every magazine, just depends on the editorial putting them. haha There's a reason why Orange was in a shoujo magazine with Shueisha and when it changed publishers for Futabasha, it was then published on a seinen magazine. lol
But for YJ, I'm not looking at the mag too much lately so I don't know too much about it.The last one I remember which was a success was We want to talk about Kaguya but even then, it was more on the current Kaguya fanbase that already buys the main title.