Agree with everything you said! I really wanted to make an otome game where the protagonist is explicitly bisexual. Even in games where you can date multiple genders, it is rare to see the character canonically be established as bi/pan.
I really wanted to find stories that tackle themes of biphobia and bi-erasure and it was a struggle to find these types of stories. So I had to make it myself!
Psst, I also wrote for Bloom where the FMC Astra is canonically established as someone who can date any gender (in Qwynn’s route, which unlocks after playing one of the other routes)! I hope you check it out!