I played 4 playthroughs as a female character, pretty much all the male companions are open for the romance scene, no matter the number of disapproval I got.
That changed in this patch. Astarian laughed in my face -- the thought of he and my heroic toon together was hilarious.
I think you would do better to drop the focus on heteronormativity and instead ask the devs for more romanceable, women companions. You would probably get more support for your position and you are getting the same result.
The previous Baldur's Gate had 17 companions, we should get at least that many.
Actually no, the point I was making was that even though I have made a number of decisions that are negative to all the male companions, they all still wanted to jump my bones as a male character, but having almost all positive reactions from Shadowheart except 1, there was no option for it and it was no. I even thought, well maybe she has an issue with tieflings, because of that statement she said about never caring for them, but I found the same reaction with my half elf, and my Drow. So I was just stating the requirements for that interaction are off at the moment. It has nothing to do with heteronormativity, it has to do with balance.
I mean at this point, I think after so many play throughs, we all know which interactions are positive influence and negative ones. So it is easy to test. Even in the last play through, I did a save before the party. Found she said no, reloaded the game, got 3 more positive interactions, and she still was no.