Time is not standing still at the event horizon. That is only the ‘barrier’ where light cannot escape the gravitation field.
Your question is covered by Einstein’s Theory of Special Relativity. Time and distance is relative to the observer.
The effects on time and space at the singularity are still up for debate. I’ve seen different ideas from twisting space to create a wormhole to twisting time for time travel or even dimensional travel. Theoretical physicists love this stuff.
As I understood it, the mathematical point at which light cannot escape corresponds to the mathematical point where time effectively stops for matter. If that’s not the case, then that’s what I’d like to know.