A lot if you guys have been saying that Naruto and Sasuke lost the Yin and Yang seal when they Sealed away Kayuga something isn’t right.
If you thing about it, The yang and yin seal are a lot similar to An Karma seal because in order to obtain one or the other, you have to get it from a otsutsuki like how Naruto, Sasuke, Boruto, and Kawaki did.
During the Isshiki battle, Kawaki lost his Karma but turns out that he never lost it because he was shown using it to “kill” Boruto
Since The yin and Yang seal is basically similar to an karma seal, Naruto and Sasuke should be able to reawaken it, Naruto and should also able to make portals with it like how Boruto make portals with the Karma.
In the manga panel below, look at Naruto’s hand
And y’all say that He lost the Yang seal