Just tested reporting a post on lemmy.world using my lemmy.ml account and I got the report on my lemmy.dbzer0.com account:
I can confirm that the report resolve didn't federate when I did it from the lemmy.dbzer0.com account. It also didn't federate on the second test when resolved on lemmy.world account and was still visible on the lemmy.dbzer0.com account.
That's still different from what was originally said and everyone would have benefited if it was just a bit longer and informative of the situation. I for example didn't knew that report resolving is guaranteed to not get federated and thought it's similar to report federation where that just sometimes happen. So I as a mod for months would have learned something new without going back and forth on this topic because of close but inaccurate info. Anyway, everyone came to an agreement so it's all good. Have a good day.
You're overthinking it.