it basically means there wasnt a lot of chapter of boruto
And the manga only came out once a month, and the drawing there was... well, in general, not a fountain. So he decided that he would read the manga when the story was at least halfway through. And now, he was here, not knowing anything about the plot. Don't know anything about new characters, don't even know about what you need to be prepared for!
The new Yonko's arrival shocked everyone, even Sengoku looked up with surprise. Whitebeard seemed uncomfortable too, after all, who knew what Kaido would do here or which side he would take.