const [name, setName] = useState('');
const [miss, setMiss] = useState('');
async function saveDisciplina() {
const realm = await getRealm();
const disciplinaRealm = realm.objects('Disciplina').sorted('id', true);
const lastIdInserted = disciplinaRealm.slice(0, 1)[0].id;
const data = {
  id: lastIdInserted ? parseInt(lastIdInserted + 1) : 1,
  name: name,
  maximum_miss: miss,
  miss_quantity: '0',
};

realm.write(() => {
  realm.create('Disciplina', data);
});
navigation.navigate('Home');
}

const [disciplinas, setdisciplinas] = useState([]);
useEffect(() => {
  async function getDisciplinas() {
    const realm = await getRealm();
    const data = realm.objects('Disciplina').sorted('name');
    if (data.length) setdisciplinas(data);
  }
  getDisciplinas();
}, []);

<Flatlist
  keyboardShouldPersistTaps="handled"
  data={disciplinas}
  keyExtractor={item => String(item.id)}
  renderItem={({item}) => <Disciplinas data={item} />}
/>