Specifically for suicide the only alternatives I can think of are chinese suicide telegram groups(from what I've read most of the chinese suicide community is on telegram), it may help to do other language searches in things like yandex search engine to find others, and the last ones aren't great quality because it's censored to hell and back on reddit.
Finding communities that share the same life struggles may also help with this.
There's also peacefulpillforums.com. For exit international. Registration on that website might be bugged idk.