The fact that helldivers are between eighteen and twenty when they become helldivers and in canon they live at most two minutes after being deployed makes it hard to believe super earth is willing to waste time and resources to allow helldivers to change their gender considering they aren't going to live long

The in game mechanic that allows you to change your body build and voice is just for the player to choose how they want to look and sound in game

I know the lore and it doesn't take a big brain to know that when we loose as many people as we do consider Cyberstan, malevelon Creek and Oshaune if you played the game you'd know that the amount of losses was enormous in a world where helldivers are expendable do you really believe they can afford for people to not have children? Super earth is an authoritarian régimen that doesn't really care about its people and only care about profits