According to Steve in this video posted in 2020 he mentions that Owen never called to apologize, so presumably up until his death he never reached out to Steve. The problem with Owen's piledriver was he did a sit down piledriver, and he did it on a dude that weighed a bit more than him and was taller than him.
Undertaker's piledriver always had him go to his knees, same with Kane, which made it safer generally.
https://youtube.com/watch?v=A68zUzDy4wU
If I'm not misremembering, I think Martha also said that Owen told her that he thought Steve faked the neck injury to make him look bad, if true that's pretty fucked up from Owen because you can see in the match that Steve got legit damaged.