Well, there's a literal king and queen. Same genders and roles you would expect. There are some skeleton brothers who are.. brothers. There is a dog marriage. Nothing shocking here, aside from the fact that they are anthropomorphic monster dogs. There are just.. lots of people and beings with a personality and identity that have nothing to do with relationships whatsoever.
Anyway, it's a GAME. It's not even very serious. It's all make believe and fantasy. Lots of silly and crazy stuff. If anything, it's has some commentary on how traditional RPG games are played. No takes meant to make a statement about real life issues.
If you take offense to video games featuring talking flowers and silly fantasy creatures, and subverting RPG expectations, then.. get some help bro. Or just pay attention to something else. It's not that hard.