Why can’t I redownload Minecraft when I deleted it
Some reasons why this could be. 

You changed your country or region:


  If you previously changed the country or region of your Apple ID, you might not see all of your past purchases.


Also try:


  If you can't find an item that you want to redownload, check your purchase history to make sure that you purchased it with the Apple ID that you're signed in with. If not, sign in with a different Apple ID.


Your purchases could be hidden:


  If you don't see items in your 
  purchase history on other Apple IDs, 
  check to see if the purchases are 
  hidden. If your purchases are hidden, 
  you might not see them even after you 
  follow the steps in this article.


Additionally if the purchase was part 
of a Family Sharing group and you 
have been removed from it you can’t 
re-download it.