P0300 & P0302 Fault Diagnosis for 2012 Chevy Traverse 3.6L - Spark, Fuel or Mechanical Issue?

I'm experiencing a persistent misfire on cylinder #2 of my 2012 Chevrolet Traverse with a 3.6L engine, indicated by fault codes P0300 and P0302. I've already replaced the spark plug and coil pack for cylinder #2, checked the gap, cleaned the fuel injector chamber using a spray cleaner, and inspected the wiring harnesses connected to the cylinder. Despite these steps, the issue persists. I haven- t encountered this specific misfire problem on any of my other Chevrolet vehicles. Given that the engine has three cam position sensors in total, I'm now considering whether one of them might be faulty — but I’m unsure which one to replace, as each costs around $30. Can anyone provide guidance on how to properly diagnose this issue? Is it more likely a spark-related problem, fuel delivery failure, or mechanical/pressure issues such as compression or vacuum leaks? Any advice would be greatly appreciated.