right now this is almost confirmed:
Yamato joined the crew, but she has some work to complete in wano.

anyway, I think that is because she didn't appear in the RED movie, even though it's a filler, it seems like Oda wants to make it look like it happens according to the manga timeline, so it's like why Yamato isn't in film RED? because she has something to do in wano & then she will join the crew in the next island
So jinbei 2.0
 
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