How do I use the settings extension in makecode arcade?

I was trying to make a makecode game similar to tamagotchi, I made a hatching system for the pet and Im struggling to understand how to use the settings extension. I want the pet growing progress to appear on the screen without the hatching system appearing. (Hatching system removed after the pet has been hatched). How do I only save the pet progress and remove hatching system at the same time? I dont really know how to explain it and im sorry for it. Help would be greatly appreciated.

the settings work with strings and not Sprites