We picked this up with Kia directly and they said: "Kia does not provide a spare wheel with the e-Niro, however, it does provide a Tyre Mobility Kit (TMK) which can temporarily solve a punctured tyre until a final fix is completed soon after application. The e-Niro does have jacking points, however, utilising this without proper equipment is not recommended due to the weight of the vehicle and the positioning of the battery pack. All new Kia vehicles are sold with a year’s free roadside assistance, which can support customers who experience a puncture. This roadside assistance can be extended after the first year."

Unfortunately, that means there isn't really an option for you to change the tyre yourself if you get a puncture. In that regard, I'd certainly recommend getting a breakdown policy on your e-Niro in case you do get a flat tyre.