No worries I totally understand. I will say, it was less an issue that there's no explicitly trans option, and more that unlike most IFs that just keep it unstated and vague, this one, as stated, makes it pretty explicit that the MC is cis right off the bat.
So if you did ever want to improve the game in that regard, I think simply removing the line about never questioning their gender, and the one about not conceiving/not knowing if you conceived would go a long way with that. IDK if there are any other moments of that later on, but if you want, I can add them here if I encounter them.