Teostra and Lunastra, Lavasioth and its deviant, Jaggi and Jagia, Seltas and Seltas Queen, and Kamu Orugaron and Nono Orugaron. Ray and Lolo Gougarf are also suspected to be dimorphic.
I know there were more dimorphic monster I was just naming a couple off head. The point was that I didn’t want more that were just variations but like “oh hey that jagras has a red mark under it’s eye so that means it’s a female” kinda thing. Like how Pokemon does it for a lot of monsters (ex. female pikachu’s heart shaped tail).