Find the merged post, hover your mouse above the post date, and it shows who last edited it.
Yeah, I know that, but there must be someone who reported those posts.
I don't think that merging should happen in all cases, especially when time difference between two posts is months or more.
I just got 7 posts from back in 2023 deleted. It looks like someone is reporting a lot of old posts.
@mprep: why merge those? What happened to this?
It looks like there is a bot doing this work.

I have an automated bot that detects potentially mergeable posts and I've recently started going through its backlog and merging posts that violate rules 21 and / or 32.
I don't like how this bot is working right now.
Some of my posts are not that important to be restored, but I see no reason to merge a post where I replied to other member with my older posts.