Stylized Poly Nature Environment contains a huge variety of high-quality, handcrafted, game-ready stylized low-poly assets for your game project's unique environment creation. Easily create beautiful nature environments, forests, mountain environments, plain fields, lakes, and rivers for fantasy or any other game genre.
Unity 2021.3 and newer, including all Unity 6 versions.
Unreal Engine 5.1 and newer, including the latest UE 5.7 versions.
Current version: v1.0
The music used in the video is not included!
Number of game-ready assets: 400+
Collision: Yes
LODs: Yes (3 levels of detail for most meshes, some have 2 or 4, depending on the complexity of the mesh)
Optimized for low-end devices: PCs, Mobile
There are materials like:

*All of these meshes has LODs!
Yes, you can use assets from this package in your game and as long as these assets are the part of the game you can sell that game. You can't sell assets alone or in a pack in any form.
The short answer is yes, you can. All assets are exported as FBX meshes, so if your game engine supports it, you are good to go. More info in FAQ page.