When I open the .blendin Blender, it can only see the tree's texture file in the shader editor. And there isn't a tree mesh at all anyway. Not in the .fbx either.
Viewing post in PSX Horror City Builder Pack comments
The trees are not included here; they are for illustrative purposes only. The description states that it only includes the houses.And the textures are fine, I should check your version of Blender. Here's a pack of trees and other stuff. https://pablopfa.itch.io/psx-retro-nature-pack-trees-rocks