Version 1.2.1. can now be downloaded.

There’s a small new update available for Hyrule Warriors: Age of Calamity. Check out the full patch notes:

– Fixed the issue where “Raise Weapon-Level Limit” in Hylian Blacksmith Guild sometimes become unavailable.
– Changed so that a jump from “DLC” on the title screen to this software’s “expansion pass” purchase page (Nintendo eShop) is possible.

Source: Nintendo Everything