When you reported the tweet, you picked the "covered by Netzwerkdurchsetzungsgesetz" option, which means you're demanding that Twitter comply with Netzwerkdurchsetzungsgesetz to act on a violation covered under the German law.

It's clear you live in Germany because Netzwerkdurchsetzungsgesetz reports are only available in Germany, and given that Netzwerkdurchsetzungsgesetz reports have a legally defined scope that only applies in Germany, I'd guess that it's treated differently from reports for regular violations (like "It's suspicious or spam" or "It's abusive or harmful").

Other regular options like the "abusive" one is much shorter and easier than picking out sections of a law.