You are absolutely right. There is almost no Ivy heterosexual content. The only stuff she does with guys is:Its good that the game took its time with Holly, because she starts reserved and its unlikely that she becomes a slut within a few chapters. Eva in GGGB rushed too quickly being a reserved nerd, gettign fucked by Jack and decided to hang out with criminals to become a gangster queen.
Holly was reserved for 7 chapters, chapter 8-9 was her first time after years, chapter 10 had her already going down on Mark, which continues with them having sex in chapter 11.
With Ivy its an issue since she starts as that allegedly crazy party girl and stays that way until now. For her, more content is mandantory to let her actions be consistent with her characterisation.
My problem with Jessica is that three scenes with her and Ian are roughly the same and don't have much to go forward. Jessica is dismissive, Ian needs to be careful with her, she is mildly curious and he says she caught his eye without elaborating. It doesn't advance their relationship in any way. The only part putting in effort is the porn/chad content, not the actual romance and building a relationship with her.
I don't care about too many GGGB cameos, Dave would be cool because you can integrate him as an opponent in the tournament, the latter lacks enemies and always using generic fighters is boring. With Ashley, its already an issue that her fate is left unclear, she could already be Jessicas girlfriend. I don't know what Ashley could bring into the table, expanding the cast is also risky and takes more work.
1) Blowjob for Jeremy with 2 other girls in the room as part of a dare after she did some lesbian stuff with Lena.
2) A little bit of wrestling with clothes on with Ian, but again that's just during a training session.
Inversely, there is a ton of both lesbian and solo content for her.
There could be multiple explanations for this.
Maybe she is actually a lesbian or mostly lesbian, and not that bi / into guys. She doesn't hook up with as many guys as it may seem that she does. That is just her reputation.
Another explanation could be that her heterosexual scenes had to be cut for time, or delayed for time.
I think it would have made sense to have a solo picture or 2 of her hooking up with someone. Like the holly / mark situation or the Jeremy / Emma situation.
If Jeremy does hook up with her he is always taking pictures with other girls. So those will get shared if not that then leaked. I don't see Jeremy not bragging about that one. So, that's probably coming up.
Ultimately all we can do is wait. The content will get there eventually. It does seem a bit absurdly absent / overdue at this point.