When I see "sporting" in reference to a object, it usually means that object or a property of that object is notable in some manner.
When substituted for "equipped," I see it most often used in product advertisements or reviews. You might see something like "Renault's latest car model is sporting a heated steering wheel" as that would be an uncommon and notable feature. However, nobody would write "Renault's latest car model is sporting a steering wheel."
Some examples:
- Samsung's Galaxy A7, sporting a three camera setup at the back...
- Kawasaki Ninja H2, sporting a 998cc inline-four-cylinder and the first supercharger on a production motorcycle...
- Raspberry Pi 4 vs Raspberry Pi 3, The new model sports four USB ports, with two of them sporting USB 3.0. This is a notable upgrade over the last model, which only featured four USB 2.0 ports.
In the case of a heartbeat sensor, that is still something that is uncommon on a phone, and not always present on a smart watch or fitness watch. It's a notable feature you would have to specifically look for on any given model.