Idk if you’ve just been under a rock and never noticed (which is admittedly possible, because Reddit just has so many people it’s easier to never notice them) or are just being intentionally deceptive. But tankies are absolutely on Reddit, they have multiple subreddits there. Hell, Lemmy started because dessalines got perma banned from Reddit because of their tankie crap and literally did the bender meme

I have personally been asked about the tankies on Lemmy and others have seen it too, it absolutely does come up