engadget.com/2300395/which-samsung-s-pens-located-with-smartthings-find Which Samsung S Pens can be located using SmartThings Find?
Samsung's SmartThings Find can locate only the separately sold S Pen Pro, not the built-in S Pens used on Galaxy Note, S Ultra and Z Fold models. It covers setup, offline finding and locating the rechargeable $100 stylus, and notes that the Galaxy S26 Ultra's left-behind warning is not tracking.