I am not certain about that, since 90% of the anime/hentai games would qualify as such (even on itch : Our Apartment, Tentacle Locker, Devil Academy, The grim reaper, Seleka-san who exposes unnoticed, Adventures of a mimic and many others).
The 'loli' subgenre on the other hand is specifically underage, and there are lots on dlsite, there might be on itch (i haven't checked).
However, i didn't understand why only this developer got such attention ?