IMPORTANT!
You need the GScatter addon in order for the trees and grass to show up.
Link for the GScatter addon: https://www.graswald3d.com/gscatter (Don't worry it's free)
Another disclaimer: The addon does not work with the map in new versions of blender, it's currently very buggy and you should not expect the trees and grass to work when you download the map.
Model Link: https://drive.google.com/file/d/15ah4ivUih771U-N3NWvgyk4mwqdaQXVN/view?usp=sharing