To unlock the Resource sharing trophy in A Plague Tale: Innocence, you will need to find all five Alchemist Carts.
The Alchemist Carts appear in the following chapters:
- Chapter 7 - "The Path Before Us"
- Chapter 9 - " In the Shadow of Ramparts"
- Chapter 10 - "The Way of Roses"
- Chapter 12 - "All That Remains"
- Chapter 16 - "Coronation"
You can find the exact locations of the Alchemist Carts in the video below (credit to NonstopTrophies on Youtube):