The edit button disappears after a while because too many people were abusing it.
Staff can turn it back on when they activate almost a post.
Almost a post almost never happens. About 95% of the time, if a post contains comments about moderation, breaks publishing standards, and that sort of thing, it vanishes.
Someone must think you are awesome to get an almost a post.
For more on why we so strongly discourage moderation discussion outside of the tinkering forum
https://permies.com/t/106410/discussion-questions-comments-moderation-Tinkering