How to manual select floor >200 at main menu?

I just completed maps above 200+ but I can’t seem to select them at the main menu

U need to buy maps again and convert it to the highest floor you’ve reached

Yup go to the shop at floor 200, buy a challenge map, and convert it until it says highest floor reached. Warning though, it will cost 75k per conversion. Idk if that’s gonna be an issue or not.