I know personally that regeneration does happen.

When I was 12 I had a tumor removed from the left instep of my foot.
This was a delicate surgery, very painful, and difficult to recover from. This hemangioma was large and deep into my foot with roots going in between my tendons.

When I finally recovered, 4 of the stitches (I have over 50 stitches and a big S scar over my whole instep), became infected, because they put the wrong kind of dressing on it.

So the top of my foot and part of my toes were numb for many years after as nerves were severed. But they did grow back eventually... it took years. What I have now is a slight loss of feeling on that foot, a bit more PN than my right foot, and some lingering swelling because lymph channels were damaged.

But the feeling did come back. Now that I am old, the lymph is not circulating back as it should so I get some swelling. But the Magnesium lotion takes that down for me nicely.

So I do know that the peripheral nerves can regenerate. But don't expect them to do so at 100% and take you back to what you were before the damage happened.