It's worth noting that FAKKU has only published a single game so far,
Honey Select Unlimited and its
DLC. We've also announced
Oral Lessons With Chii-chan, planned to be released this summer, as well as
LOVEĀ³, which is currently still under development in Japan. All the other games you see on the site are from other publishers, and we only serve as a distribution platform for those (similar to Steam).
I'm not at all involved in the games side of FAKKU, but I believe a lot of these games come from smaller publishers. It's a fairly fresh niche market, so it's probably a lot more feasible for a smaller team to work on a 2D game than one that uses 3D. Based on what I've heard from our team who did Honey Select, a ton of work went into that release.
That said, this kind of feedback is always appreciated. I'm sure more 3D content will come in the future, be it from us or other teams.