Nah, it has nothing to do with "unique version for Switch". One of the leaks from December specifically mentions April 24th, before Atlus released the teaser back in January. Anyone who is hoping for the Switch/PS4 version has to wait until then. The Switch version is more than likely still a lock.
Note that the leak mentioned in this topic
https://www.resetera.com/threads/sm...ms-persona-5r-erdrick-for-switch-leak.100918/
never actually said that P5R would be a Switch game. People just assumed because it wouldn't make much sense to "market" a game for a competing console.