When the Infinite Flight team decides on a livery, a number of factors, such as whether it would be used often and if it’s necessary is taken into consideration. Please see this post:
Now, if the KLM Asia livery was added, isn’t it a waste? There already is 2 KLM liveries in game for the 77W. Instead of adding a KLM Asia livery which probably won’t be used often (as more people would prefer the normal or orange pride livery), they can add something else, maybe a complete different airline livery.
You never know! Feel free to use the search bar to find a existing feature request for it. If there isn’t any, then feel free to create one.