Absolute index of this entry within the resolved surface.
This numeric value (int32) belongs to FInteractionUIEntryPresentation under InteractionUI.
Runtime and UI code should treat this as resolved state from the owning object. Read it to present, branch, or debug behavior without re-authoring the underlying interaction data.
UPROPERTY(BlueprintReadOnly, Category = "InteractionUI")
int32 SurfaceIndex = INDEX_NONE;