Board Thread:Theories and Speculation/@comment-6769189-20200705100921/@comment-46279039-20200713013223

Opening dimensional portals is part of Kaguya's rinne sharingan, Sasuke doesn't have kamui.

Rinne sharingan is the most powerful dojutsu in the Naruto world and has the same pattern of the Shinju fruit. This dojutsu was given to Sasuke, while Naruto receive the energy of a TenTails, only in this way they can compete against Madara or Kaguya. it's ALL very simple.