Are those quoted above claims of fact, questions, or suggestions?
Because, if claims of fact, I think those are incorrect. I do not think a post is hidden by the fact is has gotten 1 flag. In Discourse, post can be hidden by several flags of regular users, and while I’m not sure about that threshold in community.osm.org is currently, I’m quite sure it is bigger than 1.
I also don’t think number of likes has an effect on it (either for hiding, or unhiding)
What about it? (i.e. what exactly do you mean, anything beside auto-hiding post when it gets several flags by regular community members?)