However, many meshes have a combination of curved and planar features. Then when your mesh is subdivided, it will retain the look of your low poly geometry even at high levels of subdivision.

You could go to Tool> Geometry> Divide, and disable the SMT (subdivide smooth modifier) button next to the Divide button. Sometimes this is exactly what you want to happen! For instance in your case here, you have a structure without any curves or rounded features–all planar surfaces. If this didn’t happen, the mesh would retain the faceted look of the low poly geometry, even at high levels of subdivision. In Zbrush, when you subdivide low poly geometry, by default a smoothing effect is applied to the mesh. It’s possible someone here who uses that particular workflow may notice the thread and help, but you’d probably have better luck with a resource devoted to Maya. Hello can explain in general what is probably happening here, but much of this will come down to your knowledge of working in Maya.

Maya lt 2021