Since 8 months ago, Mario Kart Tour was released for mobile devices. But no one added the game to the series. Super Mario Run was in the Super Mario series. But not Mario Kart Tour. Why is there no Mario Kart Tour in the Mario Kart series?

Mario Kart Tour is free game and it's high score for stars racing based game, it doesn't showed an single uninterrupted video ad when playing this game for hours, also, it generates cups each time so, of course it will never be added to the series as well as Mario Kart Live: Home Circuit.