The only yuri mangas that are allowed to exist are baiters. Shoujo Ai and bait. The rest dies a painless death in a glass coffin like Sleeping Beauty. No touchy.
For one it's not true and for two, don't use Shoujo-ai cause that doesn't mean what you think, it's a synonym of Lolicon and not the yuri kind.
no serious yuri mangas allowed in Japan before the editor wraps them up
Maybe try Josei.
OK Bloom Into You but that ended quickly and it was too formal.
45 chapters and 8 volumes is already long enough buddy.