$2.99 Robot Character N12 Low-poly 3D model by ktkaraj. Available on CGTrader with 499212 polys and 297879 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 23.8 MB), OBJ (OBJ, filesize: 17.4 MB), 3MF (3D Manufacturing File, filesize: 20.3 MB), GLTF (glTF, filesize: 24.5 MB)