I hope a chinese film is also ok, as I can only remember this title. This plays to 90% in Finnland so there is a kiss scene with lots of snow, plus there are Santa's and reindeers ;). Title: "I Remember" (2020)
I just remembered that in the C-drama "Moonlight" (2021) there is a first kiss scene during the first snow and you can search it in YT, it is ep 19. I guess as the concept, first kiss during first snow, is popular there are a lot more you can find by searching "Drama, Kiss in Snow" for example on YT.