@Entity
@Table(schema = "test", name = "t_primary")
public class Primary implements Serializable {

    @Id
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "t_secondary_id")
    private Secondary secondary;

    private String name;
    //rest of the code
    
@Entity
@Table(schema = "test", name = "t_secondary")
public class Secondary implements Serializable {

    @Id
    private int id;
    private String name;
    @Column(name = "second_name")
    private String secondName;
    
  //rest of the code
    

CriteriaBuilder cb = em.getCriteriaBuilder();
var query = cb.createQuery(Primary.class);
Root<Primary> root = query.from(Primary.class);
var secondaryJoin = root.join(Primary_.secondary);
query.select(root).orderBy(
  cb.asc(secondaryJoin.get(Secondary_.name)),
  cb.asc(secondaryJoin.get(Secondary_.secondName))
);
var list = em.createQuery(query).getResultList();