The Cleanup Crew trophy in Final Fantasy VII Remake requires you to obtain the Chocobo & Moogle materia.
During the Chapter 6: Light the Way main mission, you’ll be tasked with shutting off three sunlights to power a cargo platform on the way to the Mako reactor. After doing this, face the Mako reactor then take a right heading west into a lift. Use the lift to cross the gap leading to a platform. Climb up the ladder on this platform to enter a small break room with a console and vending machine. Interact with the console to power down the fans in the maintenance tunnel. You will have 60 seconds to clear the enemies in the next room and interact with the console in that room. This will open the door leading behind the giant fans where you can find the materia (pink dot in map above).