This Seeking Tech guide will explain how you can unlock the trophy called Appreciating the Values of Fine Art in Sly 3: Honor Among Thieves (2024) on PS5 and PS4.
This will unlock when you “view the Gallery for all episodes.”
Use the following video as a reference:
Make sure you beat all the episodes first. Afterwards, return to the episode selection menu and then view the gallery for all six episodes to unlock this trophy.