>>4267624
Unfortunately most of the fanbase is waifufags, with yurifags a minority. The franchise simply didn't catch the attention of yurifags in the way similar ones have done so.
It's true that the developers have only ever done harem games, and this shows a lot in the writing and is a major reason for the lack of yuri, but I think it can also be chalked up to series' obscurity. Neptunia is ultimately a rather niche series, with less-than-stellar presentation and gameplay, that relies heavily on the characters' designs and abundant pop culture references to sell itself. This narrows its appeal by quite a bit, so it never had that big push that would have lead to it having an influx of diverse fanworks.
The franchise has also been mostly dead for several years, and while the autistic waifufags remained, the yurifags left as there were now much better and gayer games to hold their attention. Senran Kagura had more or less the same thing happen to it, they're now only a footnote in the history of yuri, with gachas and vtubers eclipsing them completely.
It's a shame because the characters and their interactions are in fact quite loveable, but there will never be a story that makes them justice. Nor will there be an imitator because the whole console war is very much a product of its time.