>>52868464Any 5-star will drop one specific kind at a 10.8% rate, depending on the Pokémon
5-star Gengar, Blissey, Glalie, Drifblim, Amoonguss, Eelektross, Palafin, Cetitan and Dondozo all have a chance at dropping any of the 5 flavors (replacing the usual 4 mint drops), which means you're 5x as likely to get an herb drop from them
6-star raids increase the rate to >13% and they have their own set of Pokémon that drop all of the herbs (some are on both lists like Blissey but not all of them) but obviously they're significantly more difficult and slow to do than 5-stars