Flew them before COVID … great hard-product, very pleasant staff. Lounges outside of Taiwan very 2nd-rate. Onboard IFE, food, drink very average c/f QF. Stuff like dumplings & noodles & drinks in their Taiwan lounges pretty good, showers were great.
Specific questions about wine list & dining options … meh. For food refer food-court.
I should add; I’m a bit of a fan. That food & drink is one of the most-irrelevant aspects of J travel, IMHO. If you save $500 to travel China Airlines vs <insert-best-J-meal-airline-here> it’s worth it, because even the best F meal you can get isn’t near as good as a $500 meal in a reasonable restaurant.