How do you do this category cuz every time you finish a pair minigame in free play, it just tells you how many points you got (like bumper crops and robot factory), so what would be considered a win?

As of now, that isn’t a speedrun category. That’s why there is a N/A.

Randomno had the idea to use Balance Boat requirements a couple weeks back, but no action has been taken to make this a cat, and since 2 pair minigames don't have Balance Boat requirements, likely never will be a cat. If you really want this to be a cat, join the discord, and dm either Randomno or AdamLikesCars