I'm excited to see the movie
I think we are seeing a combination of her being a bit thicker again, some fillers, and natural teeth being visible again; plus age causing them to shift a bit.
Besides that it, just seems like this is her normal energy post her 2022 (alleged) seizure , and a lot of that could be medicine related.
But it's obvious Bran is in a peaceful space.
She is still beautiful and radiant. The energy just seems more subdued for now.
But she's been working her ass off obviously from acting in multiple movies, to brand deals, the Christmas album, the Ariana and Monica collab, to wanting to do an EP and tour with Monica—she's willing and ready to work.
It seems a bit pointless and off base to be making any deeper diagnosis than that.
I get the quietness alarming the fans tho. Hopefully she does share bit more about everything or atleast puts it into the music.