In Rickmurai Jack (2021), the season finale of season 5, Evil Morty declares the existence of The Central Finite Curve, something which separates the universes where Rick is the smartest from ones where he isn't. The Morty class includes Slow Rick/Tall Morty, who is clearly a mentally challenged Rick and nowhere near the level of intelligence of even Morty, never mind Rick. It shouldn't be possible for him to be inside the Central Finite Curve.
Simple Rick's Wafers has two commercials. In the first one the tag line is read as, "Come home to Simple Rick's". In the second it's, "Come home to Simple Rick."
Although the show is not necessarily consistent generally, there is one big inconsistency in this episode, which can be deemed as a goof on this particular occasion because of its scope. Most Ricks in the citadel commute by public transportation to mundane jobs. Although the show emphasized The Rick is different from other Ricks many times, still all the other Ricks are smartest men in their universes. Therefore it is not in any Rick's character to commute to a mundane job. Furthermore, it should be extremely easy for Ricks to invent all sorts of servants for any kind of petty jobs.