Gonna have to post this one from Lemmy, apologies.
Not sure what is going on, but kbin/lemmy seem to be having federation issues over the last day or so. Several posts have been made by kbin users such as myself, but don't seem to be pushing to Lemmy. Lemmy users posting do seem to federate to kbin. I am unsure at the moment if this also counts for comments, but it does for threads at least.
I'll try and see if it's being mentioned elsewhere, but if any of you haven't seen much posted in the last day or so, that seems to be why.