I don’t think I addressed this clearly earlier, but I’m glad Oda explained what he explained regarding Wano in a recent SBS. He gave roles to all of Momo’s group except Yamato, whom Oda simply said was “still learning about the world”.
He could have easily listed Yamato as “Momo’s teacher”, “Momo’s Guard Captain”, “Momo’s Guard Dog Pet”, or whatever, he didn’t do any of that.
So for anyone putting labels on Yamato, it’s clear that Oda is putting more labels on her to trap her on Wano for the rest of her life. He didn’t even bring up the dumb “Guardian Deity” thing to trap her there for the rest of her life.
This with along with Oda telling a reader to look forward to when Yamato comes back in the SBS also solidifies this for me. That none of us should be expecting Wano to be tied down in Wano, but to be learning more about the world outside of it.