This is a paid asset, but now you can download Futuristic Low Poly Pack for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Futuristic Low Poly Pack v1.0
This futuristic low poly environment pack has everything you need to create nice low poly art-style scenes
The pack contains a lot of assets – each with assembling colliders: Buildings, Rocks, Mountains, Roads, Walls, Particle Effects and much more.
The package contains 150 Models
Package available in HDRP, URP, and Built-in render pipeline
This pack comes with an extended commercial license, which means you can use these effects, again and again, to create stunning designs
for yourself and for your clients!