Hi there mmiisshhaa,
We checked the app on the App Store and noted there isn’t any “Family Sharing” option provided for the Minecraft app. If you compare Minecraft with Timepage and scroll down to “Supports” near the bottom, Timepage shows it support Family Sharing, but Minecraft does not.
Timepage by Moleskine Studio on the App Store
Minecraft on the App Store
However, Minecraft offers it’s own type of sharing:
Minecraft now comes with the option to buy Minecraft Realms. Realms is a monthly subscription service that lets you create your own always-online Minecraft world.
There are currently two subscription options to choose from depending on how many people you want to invite to play in your realm simultaneously. A realm for you and 2 friends costs 3.99 USD/month (or local equivalent) and a realm for you and 10 friends cost 7.99 USD/month (or local equivalent).
Take care.