Inu and neko left wano a long time ago, they could have done it.
contacting shanks or WB is fairly easy. All you have to do is go to their territory and talk to the lower ranked members of their crew
contacting shanks or WB is fairly easy. All you have to do is go to their territory and talk to the lower ranked members of their crew
Now a new thought, is Inu and Neko aware of the prophecy/ 20 years plan? We will know soon but for discussion sake,is it possible they have no idea?
I think the rough understanding we get is, Oden died, the red scabbards rush back to their castle, Inu Neko starts quarreling and got captured and escaped Wano, Ashura and Denjiro fought Kaido a little allowing the rest to reach Toki and her child, Kinemon and co got sent to the future, Kawamatsu fled with Hiyori. Denjiro/Kyoshiro(hehe) then got to see Toki's last moment.
So in this scenario its possible Inu and Neko have zero idea that Momo and Hiyori survived and about the whole 20 the years plan. Its far from satisfactory i have to admit, but I'm grasping for straws for an explanation.

