>>3001638Lots of reasons. It's only been 2 months and good art has to come from inspiration and not from a schedule.
There's no telling how much unreleased or half finished art is out there. The usual release sites (pixiv, twitter, nico) aren't anonymous, a work has to be good enough in an artist's mind for it to be associated with them forever.
WW2 did not go so well for the French and there is not a lot of historical basis to draw inspiration or memes from, unlike the British and American navies which were very active in the Atlantic and Pacific throughout the entire war, respectively.