I've never had a bose device that allowed this - is that new? And for JBL, it's only the latest gen (or maybe starting with gen 3?) that started allowing it.

As for other brands I own: Jlab, jawbone, pyle, and anker don't seem to have any such functionality that I can see.

So it's far from ubiquitous, sufficiently so that it makes no sense to presume that a bluetooth name is a message from a passenger and can be understood to have any intended meaning.