function ListItem({item}) {
  return (...);
}
function mapStateToProps(state, ownProps) {
  // look up item from state using ownProps.id e.g. if `state` maps ids to objects
  const item = state[ownProps.id];
  return {
    item,
  };
}
const ConnectedListItem = connect(mapStateToProps)(ListItem);

function List({itemIds}) {
  return (
    <FlatList
      data={itemIds}
      renderItem={({item}) => <ConnectedListItem id={item} />}
      ...
    />
}

// example: <List itemIds=[1, 2, 3] />