I had never thought about this so I looked it up. Shulchan Aruch Orach Chaim 271:10 distinguishes between “Vaychulu”, “Borei Pri HaGafen”, and “Kiddush” and indicates that they are recited in that order, so strictly speaking the “Kiddush” is the blessing after the blessing on wine. Mishnah Berurah to the same states that one must repeat “Vaychulu” even though one has said it twice in shul, even saying that if one did not say “Vaychulu” at kiddush one says it during the meal over a cup of wine. MB also cites an opinion that it is required to recite “Vaychulu” three times every Friday night — twice in shul and once at the the meal. Interestingly, though, the reason given for saying it at the table is so that children and family members who presumably didn’t go to shul can hear it.
So I guess it technically isn’t part of Kiddush but you still have to say it?