"So from a technical point of view streams is dead" -- Alan Cox in https://lkml.org/lkml/1998/6/28/138 and yes that 1998 in the URL is the year, so it's at least 15 years past dead now.
STREAMS is not implemented in GNU/Linux. You can get a set of man pages that describe the interface as specified by POSIX by installing the manpages-posix
and manpages-posix-dev
packages, but you're wasting your time reading about STREAMS if your interest is anything but historical.
Of the two add-on implementations of STREAMS for Linux mentioned in the wikipedia article, one is a dead link and the other one goes to a site (openss7.org) which is focused entirely on telephone switching, and hasn't been updated since 2008.