If you see faceted shading on hi res you might beveled each edge first accidentally or give each edge a crease (shift+E) or you just have subdiv modifier in "simple" mode.
Hi! If I understand your question correctly and this is about the facetted look once re-meshed, that's expected behaviour with low-poly meshes. The resulting, dense mesh is the same shape as the low-poly just with a higher density, which results in a much more defined shading. To get a smooth surface you will have to apply…