i will say... i feel like "sexual dimorphism" is kind of a cop-out. like, how people complain when, in fiction, men look like cool monsters and the women of the same species are always somehow human big titty girls. i feel the complaint is valid, so let's just be honest about the reason - that's not what the author had in mind for brienne.
i think the most productive thing for watchering here to do is to ask in "what content would you like to see" for a minotaur lady that meets his needs.
Just gonna fully retype the minotaur sexual dimorphism essay, for anyone who hasn't read it:
Brint's kind of minotaur, Southern/KM, has the men being full cow and the women being human with cow features. Kavi's kind of minotaur, Northern, has the women being full cow and the men being small and cute human boys with cow features. Even their cultures are mirrored, in that Northern women are the ones who fight and hunt, while their boytoy harems take care of the houses. This is explained by the two original genders of minotaur gaining vastly different sexual preferences in the Olden Days once they started mingling with humans, then eventually splitting off from each other and becoming two separate peoples (reinforced by alchemy and this kind of selective breeding). The minotaurs are the only race so far that has this kind of dimorphism, as well. Everyone else just has basic height/muscularity/curvy differences.
The minotaur dimorphism is much more fleshed out here than in most other media with cow people.
If/when Kavi gets sexual content, she would definitely fit into their need to be dommed by a massive furry cow lady. She's even the same height as Brienne, but she's broader-bodied and her muscles are hidden under a layer of fur and squishiness.