The ToucheableItem wrapping the label content has a default style that can not be overriden properly: https://github.com/react-navigation/react-navigation/blob/b7fa90bf8d338d1146c7f60cca485a8af2f79772/packages/drawer/src/views/DrawerItem.tsx#L100
It would be great to allow this.
For my case, I need to reduce the padding. The only ugly hack I found is to made a negative vertical margin on listItem style.