It's a domestic machine. You might (with the right needle) be able to sew some leather or canvas but a steady diet of heavier materials will likely break your machine at some point. I can guarantee it will struggle with multiple layers of heavier material like where one seam meets another. Most domestic machines do. I'm not going to say all-someone will prove me wrong.
Pretty much all domestic sewing machines are designed to handle a wide range of material but keep in mind a jack of all trades is usually a master of none. If you need to sew upholstery, heavy canvas or leather on a regular basis you're far better off looking for a used industrial that's designed for those materials.
Rodney