It looks like you're referencing a — specifically the one that added Cindered Shadows (Wave 4 of the Expansion Pass) plus quality-of-life features like the Journal and extra save slots.
expansion and several highly requested quality-of-life features Invision Game Community 1. Key Features (Free for All Players) fire emblem three houses nspupdate 120 2 new
For players interested in a more detailed overview of the changes and fixes, the patch notes for Update 1.2.0 are as follows: It looks like you're referencing a — specifically
: Includes the "Tricky Merchant" outfit for Anna and the ability to see breed names for monastery cats and dogs. New Free Features (Available to All) Tea Time with Rhea fire emblem three houses nspupdate 120 2 new
Here Are The Full Patch Notes For Fire Emblem - Nintendo Life