With that Star Trek context out of the way, let’s get back to the grim subject of Reman genocide. At the end of the second season, Discovery jumped forward in time to the 32nd century, allowing us to learn more about what various alien races have been up to for the last few centuries. Notably, we learn that the Vulcans and Romulans have re-unified (nice work, Spock!), with members of both races living in harmony on the planet Vulcan, which has since been renamed to Ni’var.
For all that Star Trek: Discovery tells us about the Romulans and the Vulcans, the show has (so far, at least) not mentioned anything about the Remans. One of the reasons this is notable is that the Reman homeworld, like the Romulan homeworld, would have been destroyed by the supernova we first hear about in Star Trek (2009). The existence of Reman assassins in Picard confirms at least some of them are still around in the 25th century, but if those are part of only a handful of survivors, it’s possible the whole race has been wiped out (thanks to their various enemies) by the 32nd century.