The game was supposed to land at some point in 2021, with full cross-play support at launch, but this delay will push everything back into 2022. There’s no specific date on when we can expect the open beta or full rollout of the game, so you’re just going to have to keep using Pokemon TCG Online for the next little while. Don’t worry about redeeming your collections, though; everything you have in the old app will migrate over to the new app once it’s launched.
