My one recite kiddush including the blessing over wine for someone else in the course of a meal they’ve already recited kiddush/blessing over wine? What if the one -Reciting the blessing specifically had in mind to cover wine during the meal?
Yes, since both the blessing over the wine and the kiddush itself are both part of the mitzvah of kiddush we apply the rule that even one who has fulfilled his own obligation may recite the blessing again to help another fulfill their obligation. If the one who still needs to hear kiddush is capable of making kiddush on their own, this would be preferable but not crucial.
see Tractate Rosh Hashana 29b, Shulcha Aruch 273:4, Mishna Brura ibid. s”k 20