[benoau]

There's only two ways to get flagged: automatically via defence mechanisms, or submitting something HN users deem inappropriate.

There already are moderators and mechanisms for HN users to "vouch" for flagged posts too, your post doesn't seem to be flagged now so I guess some people did that.

[gagan2020]

Yes, now its not flagged. Thanks for Good people of HN who vouched my post. And, thanks to you as well for explaining it perfectly.