>>59005885>>59005906>>59005944Pokémon designs are a lot of more streamlined and on-model right out of the gate these days, which explays why sexual dimorphism is much rarer (and prominent when it does show up) these days. Off-model stuff is to be avoided entirely or memory-holed if possible.
They did give female Eevee a heart-shaped tail starting in SwSh (it already existed in LGE, but was exclusive to the partner Eevee). I'm kinda miffed they didn't make the Eeveelutions sexually dimorphic too.