Looks like only available in one restaurant for now, but it’s a start.
“For one thing, cultivated meat is not vegan or vegetarian.” -> I know some vegans who would disagree with that, on the grounds that no animal cruelty or slaughter is involved. I suspect there will be a fair bit of debate on this as cultivated meat becomes more widespread. I would guess just like we’ve already got “I’m a vegetarian who eats fish” we’ll end up with “I’m a vegan who does/doesn’t eat cultivated meat.”