Just in case anyone is using their account here to post to off-instance communities: those posts and comments seem to have a very high failure rate. There is a lot of activity and accounts on this instance. This is to raise awareness, not to pull people away or break up the lemmyverse. Quite the opposite really: there is a technical problem on this instance that might be preventing the lemmyverse from functioning as it should.
A post I sent 4 hours ago to lemmy.ml wasn’t showing up. After I edited it once with no changes, it showed up as posted 1 minute ago. It’s definitely an issue taking place. You can check to see if your posts are showing up at their destinations with the rainbow federation link button next to posts.