User blog comment:TheDipDap1234/The Ridonculous Race Finale - Team Reviews/@comment-4389268-20151010164327/@comment-1734566-20151010194309

Well, Geoff has explained before that she's apparently "surfing around Australia" or something like that. So maybe she's just THAT busy? IDK. I think it would've felt a bit...gratuitous to have her cameo to the point of actually having lines. Because this is supposed to be a standalone series - having her appear would more than likely require some previous knowledge of TD all the way back to TDI and TDA.