team up in mirage?

was just curious if there were folks that know something I don't. I've just noticed that there are never any team up requests in Mirage (at least not that I can see, since I'm still pretty early in the story there) but also that people don't seem to ever join when I try to set one up. is there a stigma with mirage? I'm just trying to pass this boss I can't seem to solo lol