The Civilization Twitter account made Valentine's cards for this year's Valentine's Day, on request on the day.
It took me a while, but I've now collected them all, and put them in a gallery here on CFC, https://forums.civfanatics.com/media/categories/civ6-valentines-cards.58/ .
Originally from: https://twitter.com/CivGame/status/1493306550508609540
Maybe they'll be of use next year or so .