Multiplayer for PS4 and Xbox One is still in the works
The best local co-op games on Nintendo Switch - Polygon
A Guide To Stardew Valley Farm Simulation RPG Video Game Co-Op Mode
Best Co-op Games On The Nintendo Switch in 2022
Stardew Valley co-op – plus a bonus Stardew Valley coop guide
Stardew Valley on Nintendo Switch now has multiplayer for co-op farming online or via local wireless, multiplayer stardew valley
Stardew Valley multiplayer comes to Switch this week - Polygon
12 Best Co-Op Games To Play On Valentine's Day - GameSpot
Game sharing on the switch allows both people to play at the same time. (more info in the comments) : r/NintendoSwitch
Stardew Valley co-op – plus a bonus Stardew Valley coop guide
Stardew Valley co-op – plus a bonus Stardew Valley coop guide
Everything you need to know about Stardew Valley multiplayer
Stardew Valley's big local co-op update has come to consoles - The Verge