Let’s say you play an important mission located on a certain planet (like Key Rush), and you fail, then meaning you will never be able to complete the mission on that planet again, because that mission can only be done once.
You’re saying that: Missions that can only be flown once should be marked as “won” even though you had lost them.
In that case, they should be marked as “Missions flown” not “Missions Won”, which already exists but not the menu on which you have specified.
I think iA can solve this problem by simply not giving you any keys until you emerge a victorious in that mission, after that the mission will be closed.