Mio indeed didn't need anything repeating and he watched silently and appreciatively.

It was obvious that this glowing man had not been in a forge for a long time. Not from any loss of skill but from the look of him as he worked. Someone being reunited with a thing they loved after a time apart.

Mio is happy to watch him and let him spend as much time as he wants working, he can't imagine being kept away from his craft and so he will not deny this Fëanor the time.