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There is the same problem on reddit, so they brought it here too so new users won't be disoriented (/s)
Didn't that have something to do with shadow bans on Reddit?
Or comments pending of mod approval.
I mod a few communities and haven't seen anything relating to comments pending mod approval. The only related setting I have on the communities is to restrict posting to moderators (comments on the posts should still be open to anyone).
It's pretty easy to see on r/askeconomics. All top-level comments there require mod approval, but will add to the number of comments while waiting for approval. So it's pretty common to see posts with 10+ comments listed, but nothing besides the pinned automod comment is visible.
Oh you meant on Reddit. I was talking about here on Lemmy we don't have anything like that.