An Action State Machine Pattern I like in Unity.

ActionState.cs

// Got this from Jason Weimann's videos.  I like the pattern much better.
// from https://unity3d.college/2017/05/26/unity3d-design-patterns-state-basic-state-machine/

public class Entity: Monobehavior
{
    private ActionState _currentState;
    
    private void Update() {
        _currentState.Tick();
    }
}

// Abstract Class to build real actions from.
public abstract class ActionState 
{
    protected Entity entity;

    public abstract void Tick();

    public virtual void OnStateEnter() { }

    public virtual void OnStateExit() { }

    public ActionState(Entity entity)
    {
        this.entity = entity;
    }
}