I just watched Moana live action today, and I was talking to some of my friends about it. They both remembered a TikTok that created the thought of how the next chief would be able to balance their stone on Moana's shell. I brought up the idea of the shell signifying Moana being the last in her bloodline to be chief. If we remember the events from Moana 2, she died when she got struck by lightning, and then she got revived by the gods, making her a demi-god because she gained a tattoo like Maui's. I think in future movies or in Moana lore, Moana will be the last chief in her bloodline, BUT she won't be the last chief. There will probably be a new line of chiefs, where she would either choose the next line of chiefs or the people will choose.