The vast majority of yuri webtoons aren't hosted here, since they're tied to various apps and platforms. Taming Grace and Hummingbird Effect are two that come to mind. Also, Her Shim-Cheong is my favourite yuri story of all time, so I'm glad to see it mentioned.
Shokei Shoujo no Ikirumichi is a yuri isekai LN that got a manga adaptation, which you can find on mangadex, plus an ongoing wordpress translation. It does some interesting stuff and won an award, so it might be worth checking out, especially since it's a lot darker and grittier than I Favor the Villianess or Revolution of the Genius Girl.