I see a non-dead comment from you, so it doesn't look like you're shadow banned. I do see that you posted the same comment three times across three accounts on a thread, so that's definitely not behavior that is encouraged here. I'm guessing your original comment got flagged (maybe by humans, maybe not - no clue) and you attempted to re-post from other accounts which likely marked your posts as spam.
As mentioned in the sibling comment, reaching out to the moderator is the best way to figure it out.
Update: the thread seems to have fallen off the Ask HN page very quickly so there does seem to be some penalty applied.