Suppose Kiddush were forgotten on Leil Shabbat. Would a person be allowed or even required to do Tashlumin and then recite Kiddush during the daytime since it was missed the previous night?
Based on a statement from Pesachim 105a, if Kiddush was not said on Friday night either by accident or on purpose it can be said the entire next day (Rambam Shabbat 29:4, Shulchan Aruch OC 271:8), with the exception of the introductory paragraph of Vaychulu which is only said at night as that is when the creative work was originally finished (Rama, ad loc).
Although Amram Gaon (quoted in the Tur OC 271) held that Kiddush may only be made up during the day if it was forgotten at night by accident just like regular Tashlumin, this position is not accepted lehalacha. The disagreement can be based on how each understands the nature of kiddush: if kiddush is actually sanctifying the day, then it would have to be said at night and saying it during the day would only be a make-up; however, if kiddush is our declaration that the day is naturally sanctified, then saying it during the day would be the same as saying it at night only later. It would seem then that we hold like the second view.