@Entity
@Table(name = "ENTITY_A")
public class EntityA {
	@Id
	@GeneratedValue(strategy = GenerationType.AUTO)
	@Column(name = "ID")
	Integer id;

	@JoinColumn(name = "PARENT")
	@ManyToOne
	EntityA parent;

	@OneToMany(mappedBy = "parent")
	List<EntityA> children = new ArrayList<>();

	@JoinColumn(name = "ENTITY_A")
	@OneToMany(orphanRemoval = true, cascade = CascadeType.ALL)
	@Fetch(FetchMode.JOIN)
	List<EntityB> listOfEntitiesB = new ArrayList<>();
}

@Entity
@Table(name = "ENTITY_B")
public class EntityB {
	@Id
	@GeneratedValue(strategy = GenerationType.AUTO)
	@Column(name = "ID")
	Integer id;
}

	@Override
	protected void configure(Configuration configuration) {
		super.configure(configuration);

		configuration.setProperty(AvailableSettings.SHOW_SQL, Boolean.TRUE.toString());
		configuration.setProperty(AvailableSettings.FORMAT_SQL, Boolean.TRUE.toString());

		configuration.setProperty(AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, "10");
	}
	
	@Test
	public void hhhXXXXTest() throws Exception {
		try (Session s = openSession()) {
			Transaction tx = s.beginTransaction();
			EntityA entityA = new EntityA();
			EntityA childA1 = new EntityA();
			EntityA childA2 = new EntityA();
			EntityB entityB1 = new EntityB();
			EntityB entityB2 = new EntityB();
			EntityB entityB3 = new EntityB();

			entityA.children.addAll(List.of(childA1, childA2));

			childA1.parent = entityA;
			childA1.listOfEntitiesB.addAll(List.of(entityB1, entityB2, entityB3));

			childA2.parent = entityA;

			s.persist(entityA);
			s.persist(childA1);
			s.persist(childA2);
			s.persist(entityB1);
			s.persist(entityB2);
			s.persist(entityB3);
			tx.commit();
		}

		try (Session s = openSession()) {
			List<EntityA> entitiesA = s.createQuery("select a from EntityA a where a.parent is null", EntityA.class)
					.getResultList();
			assertThat(entitiesA).hasSize(1);
			assertThat(entitiesA.get(0).children).hasSize(2);
		}
	}

Hibernate: 
    select
        e1_0.ID,
        e1_0.PARENT 
    from
        ENTITY_A e1_0 
    where
        e1_0.PARENT is null
Hibernate: 
    select
        l1_0.ENTITY_A,
        l1_0.ID 
    from
        ENTITY_B l1_0 
    where
        array_contains(?,l1_0.ENTITY_A)
Hibernate: 
    select
        c1_0.PARENT,
        c1_0.ID,
        l1_0.ENTITY_A,
        l1_0.ID 
    from
        ENTITY_A c1_0 
    left join
        ENTITY_B l1_0 
            on c1_0.ID=l1_0.ENTITY_A 
    where
        array_contains(?,c1_0.PARENT)