Total number of displayable pages in the filtered surface.
This numeric value (int32) belongs to FInteractionUISurfaceProjection under InteractionUI.
Pages with no displayable command rows are skipped. If filtering leaves no displayable page, the runtime clears the prompt surface instead of reporting an empty page.
UPROPERTY(BlueprintReadOnly, Category = "InteractionUI")
int32 TotalPages = 1;