Yeah, so...I tried to tag some of my friends on some of my stories. Waited a long time, then I PM'd one of em, he said he didn't get any notifications despite the fact that I mentioned him in a comment and literally never block or mute him (why would I do that?).
Apparently, mentioning other users in the comments of stories won't send any notifications to the said users now. I wouldn't even bother sending them PMs one by one for them to notice my stories, so tagging them in comments seems to be the best option. But now, idk what to do smh.