Did Momoshiki use COAT?...those who seen the movie

[The Demon Hawk]

^ I clearly meant that his S/T ability is his only means of traveling to the dimension/planet, so it's obvious that he did not create anything, let alone the fact that he lacks Yin-Yang release.

Oh my bad. I thought you were saying "It's a dimension only he can access".

And I agree with the fact that Momoshiki didn't create anything.