[flagged] shows on comments when flags significantly outweigh downvotes.

[delayed] shows when a comment isn't being displayed yet because it's still less than N minutes old, where N is the 'delay' setting in the commenter's profile (about which, see https://news.ycombinator.com/newsfaq.html).

Does that answer your question?

it answered it for [delayed], thanks :) so there is no way to show [flagged] ?

We have different mental models here; in mine, that question isn't well-formed, so I need to know what you mean by it :)