Just because you haven’t seen a change does not mean they have not been seen, they may have been looked at, or the staff might just be busy.
I imagine this is a Discourse automated feature.
In general, I would recommend limiting the number of flags you cast wherever possible. Generally this community is pretty good at sticking to the guidelines and flags are not needed too often. They all have to be manually reviewed by the very limited number of moderators and the more very minor flags they receive, the longer it takes to deal with the important stuff.