A very good friend of mine
completely lot his thumb in a Honda-Pilot
accident the first year of Uni.
They surgically removed his ring finger
and re-attached it where his thumb was.
(I didn't even noticed after working with him
for >1 year

)
He used to be quite self concious about it
and when younger, very distressed/angry/ashamed.
But eventually he's accepted what happened
and is able to talk/joke about it.
As ever time heals.