>>11258224
Don't sort by hits on AO3. That's half of what causes your problem. More extreme kinks = more tags = shows up in more searches = more hits. There's often not much futa content because it often comes alongside other cock-related kinks (size, monsters, etc) or stuff involving dominance/submission/abo. When it comes to softer futa stuff, it can get annoyingly hard to find, depending on the fandom. I've noticed a growing trend of calling more vanilla futa/f stuff "futa yuri" but there's no way to reliably search for it.

So... I have written a LOT of futa stories, including plenty that are "vanilla" with the caveat that I only write fanfiction. Here's ones I've picked out that I remember are pretty vanilla.

ZZZ:
https://archiveofourown.org/works/62034352 (Anby/Nicole)
https://archiveofourown.org/works/57773251 (Belle/Nicole)

Star Rail:
https://archiveofourown.org/series/4017694 (Qingque/Fu Xuan)

Genshin:
https://archiveofourown.org/series/4214503 (Candace/Dehya/Dunyarzad)
https://archiveofourown.org/works/60444061 (Mavuika/Xilonen)
https://archiveofourown.org/works/56253088 (Kokomi/Lumine/Yae Miko)
https://archiveofourown.org/works/55038763 (Guizhong/Lumine)
https://archiveofourown.org/works/52430290/chapters/132637132 (Amber/Eula)
https://archiveofourown.org/works/48494566 (Shenhe/Yun Jin)
https://archiveofourown.org/works/47194867 (Amber/Eula)
https://archiveofourown.org/works/46900198 (Lumine/Yae Miko)
https://archiveofourown.org/works/40589529/chapters/101692935 (Ei/Yae Miko)
https://archiveofourown.org/works/34394014 (Ei/Sara/Yae Miko)
https://archiveofourown.org/works/32967478/chapters/81822925 (Ganyu/Keqing)

Fire Emblem:
https://archiveofourown.org/works/48210232 (Byleth/Dorothea)

Birdie Wing:
https://archiveofourown.org/works/43760232