>>23289655The timeline in RSE might not be the one for ORAS.
If we're to follow the postgame of ORAS, Zinnia implies that RSE was a different timeline/in the past.
Plus, there's the Battle Chatelaines, the various present Kalos references in ORAS Hoenn (e.g. Mauville City), the fact that Berry Blenders and the Game Corner were mentioned as a thing of the past.