Indirect Reference

7_ScriptableSubAssets

If you select PowerUp Gameobject in the hierarchy, you can see that it has a HealthPowerUp component attached to it.

This component references the scriptable object wrapper (PlayerStats), as opposed to directly referencing the Health ScriptableVariable. If you check the code for this component, you see how to access the Health indirectly:

public class HealthPowerUp : MonoBehaviour
{
    [SerializeField] private PlayerStats _playerStats;

    private void OnTriggerEnter(Collider other)
    {
        _playerStats.Health.Add(30);
    }
}

This can be useful. For example, if you need to access multiple sub-assets of the same wrapper in a class. If you press Play and move the player into the power up, it will heal the player.