Yes, option sets are copied from main apps to sub apps when you create a sub app. Any option sets added to a main app will also get pushed to all sub apps.
You can find more information on what is and is not pushed from main apps to sub-apps here.
Yes, option sets are copied from main apps to sub apps when you create a sub app. Any option sets added to a main app will also get pushed to all sub apps.
You can find more information on what is and is not pushed from main apps to sub-apps here.