you can use tanuki race service to have a dick dude
But they do not want one, that is the point. Also, it is kind of shitty game design that one of major parts of your game is locked out for someone if they do not have a dick. Especially since it is used to access one of companions. Like, sure, some NPCs require you to have a dick, but non of the companions do.
Hell, from what I heard, if you spoke to Keros as a only vagina wielding NPC, he would either give you a option to grow a dick or to give him medallion. Which would lock you out of Kiyoko. Like, wow. Someone please correct me on that since that can not be real. It is literally telling subgroup of players to fuck off.
And even if you had one, if it was not attached to male NPC, you would have felt unwelcomed. Since your family always referred to you with male honorifics. Even if everyone else referred to you by female ones. So whichever way you look, anyone that did not play as a man with a dick was loosing in some way.
At least now, with incoming strap on expansion and gender correct pronouns, the bullshit ,that should not have been in the game to begin with, will be fixed.