"My interface scan returns nothing at runtime"

Scene.GetAllComponents<Component>().OfType<IInteractable>()

compiles, runs, and returns nothing — even though interactable components are clearly in the scene. Prompts never appear; nearest-target logic always finds null.

Interface-based scene scans are unreliable in this engine. GetAllComponents<Component>().OfType<I…>() has been observed to return an empty sequence at runtime even when concrete implementors exist.

Keep an explicit union of concrete types:

public interface IInteractable
{
    string GetPrompt(/* player */);
    void Interact(/* player */);
}

static IEnumerable<IInteractable> AllInteractables(Scene scene)
{
    foreach (var c in scene.GetAllComponents<Door>()) yield return c;
    foreach (var c in scene.GetAllComponents<Chest>()) yield return c;
    foreach (var c in scene.GetAllComponents<Workbench>()) yield return c;
    // one GetAllComponents<T> per concrete implementor
}

Cache the list on a short timer (e.g. 0.25 s) if you scan every frame.

Pick nearest whose prompt is non-null — components can decline (healthy panel → no prompt; damaged → "re-anchor").

UX that works: floating marker over the target (bounds-top + bob) + a [F] prompt line in the HUD.

GetAllComponents<T> is typed against concrete Component subclasses the scene graph knows how to enumerate. Filtering a broad Component query by interface does not reliably surface those instances at runtime — so you pay the boring explicit list and get correct results.