No? Something serves as a status signal when the person who has it has a high probability of being different from someone who doesn’t. A private jet is a status symbol because you have a high probability of assuming the person who owns it has a level of wealth or influence that most don’t. A degree from Caltech has status compared to a degree from random college because there’s a high probability the Caltech degree holder is more competent.
An iMessage chat tells me nothing about the socioeconomic characteristics of the owner of the iOS device, unless I am missing something.
Edit: although, now that I have read this whole thread, I am thinking that maybe it’s not the economic status people are looking for, but are somehow deriving some assumption about their “socio” part of “socioeconomic” status, as a non iOS user is perceived to be maybe “different” or “weird” in some way for not conforming and having an Android versus an iOS device.
I personally have never thought that, since I use Signal/WhatsApp/iMessage, and if you don’t have iMessage, I just use one of the other two, and I don’t care. But evidently, some people do.