Yup still exists. It is also available in KDE Help Center. And you can quickly jump to a man page you typing "#man" into KRunner.
JRepin
Yup I agree, openSUSE Tumbleweed with KDE Plasma desktop is just awesome. my favourite distro at this moment,
But isn't this the point of cross-posting feature? The intended use; to get the info into many communities/instances? If it is the right community that is on topic it is not spamming. Since not all people are on all instances and all communities and might miss something good otherwise. I take it more as a visual spam and a Lemmy annoyance. Similar as to what it has been on Mastodon when in the past consecutive re-boost of posts would also show up multiple times one after another. And in latest versions of Mastodon they fixed it so only one entry is shown. I think this is what Lemmy should also do.
Judging from their past and all the bad actions they have done in the past, bad for democracy, privacy, minorities and marginalised people and how openly they have a far/extreme-right bias. Well I feel extremely negative about them joining in. They were also part of destruction of another open/federated protocol in the past: they played big part in destroying XMPP/Jabber messaging. So I am afraid they will do their usual embrace, extend, and extinguish thing and their surveillance capitalist thing and yeah. no good. Best to block their instances outright.
Even quicker is "#X"