The current season does not focus on one game, the protagonists not only travel to Galar. I would advise you not to follow the game mechanics when you watch anime.
Are there regions like Kanto, Johto, Hoenn, and Kalos in Sword Shield? Oh no, sorry.
Ah, one more thing. There were four people in...
My theory may be absurd... but well, anything is possible in Journeys. What if Sabrina gives Ash a new Pokemon for winning? What if it's Gardevoir?
I guess that would be a great cool reference to Ash giving her Haunter in OS.
I knew long ago that she would be Ash's rival, from the moment they both got a draw at Johto.
She even told Ash openly that she want to fight him again, accepted the challenge of the rank race to Leon.
Looks like we're getting a lot of focus on Ash. In the list of people without visibility, Korrina is missing, which means that there will be no fight with her, but mainly for something else, probably a mega evolution arc.