Quote Originally Posted by Bulbasaur View Post
Where did they say that?
it was more of an assumption since -> https://en.wikipedia.org/wiki/Pokémon_Go

Where is says ( In May 2018 Niantic announced the addition of Alolan variant Pokémon first featured in Pokémon Sun and Moon, & In September 2019, Pokémon first introduced in the Unova region of Pokémon Black and White were added to Pokémon Go )