Apparently the meat is made using Foetal Bovine Serum (which requires the slaughter of cows), and chicken cells (which do not require the slaughter of a chicken). [1]

So technically a vegan would not be happy eating it. I'm however curious about the ratio of slaughter to end product (e.g. is it one slaughter to 10kg of end product, or one slaughter to 1 tonne of end product), since that may sway some vegans/vegetarians.

[1] https://www.theguardian.com/food/2020/dec/07/lab-grown-chick...