assuming it was replaced because one or both of the ball joints at its ends was failed, it might need an alignment now.

If the car was aligned with a sloppy joint or less than tight on either or both ends of the center link then replacing that loose link with a new in-spec tight link will change the previous alignment that was done earlier with its attendant compensation for the sloppy link.

So it depends if there was an alignment done with that less than tight link in place.