Can you allow inhereted ScripableObjects to be linked in the editor without dragging and dropping.

My Basic set up looks like this:

 public class Powerup : ScriptableObject { }
 public class FirePowerup : Powerup {}

Then I have a player class that has a power up publicly available to access

 public class Player : MonoBehaviour
 {
     public Powerup myPowerUp; // this shows up as a field in the inspector
 }

The goal is to let me create FirePowerup objects in my project and assign them in the inspector. And it MOSTLY works but I can ONLY assign them by dragging and dropping, they do not show up if I click on the circle in the inspector and try and get a list of all power up objects. Is there any way to get them to show up?