Technically if you "search" your emojis for "bok" and then "lettuce" the same emoji appears. My first guess was that bok choy meant "leafy green" but it means "White Vegetable". I actually had this discussion yesterday, otherwise i wouldn't have known bok choy was an emoji at all.
https://emojipedia.org/pig/
https://emojipedia.org/pig-nose/