That’s just what I would have said - it’s not normal procedure for the priest to leave the sanctuary area to offer a sign of peace, but certainly here in Ireland it is customary for the priest to do so at a wedding or a funeral - to the immediate family. I do know of one priest, many years ago, who used to walk down the centre aisle of the church (about 10 pews) and offer the sign of peace to each person on the outside of the pew - however it is certainly not common practice, and I haven’t seen a priest do this sort of thing in years!