i highly doubt that Eternal Flower Floette will ever be distributed. they actually did give it a pokedex entry for some reason in ultra sun and ultra moon but, its still unobtainable without hacks or cheats. and seeing that the Flabébé evolution line did not appear in Pokemon sword and shield, even after the DLCs, its safe to say that game freak completely forgot about that Pokemon and just scrapped it for unknown reasons. and then scrapped it again in the ultra games before just forgetting it entirely. so no, it probably will never be obtainable legitimately. and whats more is that they completely removed that kind of Floette from Pokemon home which further proves that game freak forgot about it and will never be obtainable.