Maybe it's time for me to explore this area too. Me too pls hha
they're pretty popular so idk if you've read them before
https://www.mangago.me/read-manga/sadistic_beauty_side_story/ (you don't need to read the main story to understand this one)
https://www.mangago.me/read-manga/moonlight_garden_kang_unnie/
Some good ones are
Getting to Know Grace
White Angels Have no Wings (& the sequel White Angels Have no Rest)
Living Will
A Story Concerning Sweets
What Does the Fox Say?
(I want to read more yuri manhwa but these are some I like that I've read, so I'm sorry I couldn't give you a very long list)
and I second what the other comment said with Sadistic Beauty Side Story A
Happy reading :)
Recommendations for the best yuri manhwas you’ve read I’m trying to enter the new market