Help me understand how Kobe Bryant's achilles surgery works?

So from what I know is that Kobe Bryant had torn his achilles and received world class operation the best a multi millionaire could buy.

He said in a recent interview that he doesn’t think about his achilles when running and doing other drills. He reported no pain, soreness, etc. He did mention that he’s still stretching it out since there’s a period of time where let the achilles heal.

I’m just wanting to know, can it have been repaired and then stretched back into a “flexible” state that it once was? Or will it have a certain tightness threshold?

Chances of it tearing again?