The "first wave" of content moderation appeals focused on the establishment of oversight and review boards that wronged users could appeal their cases to. The idea was to establish these "paradigm cases" that would clarify the tricky aspects of content moderation decisions, like whether uploading a Nazi atrocity video in order to criticize it violated a rule against showing gore, Nazi paraphernalia, etc.
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This hasn't worked very well. A proposal for "second wave" moderation oversight based on arms-length semi-employees at the platforms who gather and report statistics on moderation calls and complaints hasn't gelled either:
https://pluralistic.net/2022/03/12/move-slow-and-fix-things/#second-wave
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