The usefulness of a back brace varies from person to person.
If it is only habitual hunchback or poor posture, then a fixed back brace can help and with your strong sense of improvement, the hunchback can be improved.
If the hunchback is more serious and the spinal curvature is more severe, then the application of fixed back correction straps is not only ineffective but may also have side effects on the body.
Therefore, whether the use of correction belts is useful or not, you need to confirm whether you have damage to your spine first.