To smoothen the transition to the looming update 1.6.0 we already updated the servers a couple of days ago. Since then you can already see the rewards of the upcoming new "seasons game mode" which in the first season will be these asia pieces.
They won't be directly purchasable for the foreseeable future.
Once the game itself is updated it should also remove the "View in shop" button. This is unfortunately an unintended side effect of the earlier server update.
Thank you very much for your message and have a great day!