Elly - there is no aspect of the car’s computer system that will directly tell you whether or not the spark is consistent. So there were no “results” that pointed to a spark problem.
If the spark is a problem on a cylinder it WILL set a misfire code.
If compression or fuel or air are a problem on a cylinder that can ALSO result in the same misfire code. The codes come from having combustion not take place in the cylinder. In most cars the actual report usually comes from a glitch in the crank sensor signal. Nothing monitors the actual spark.