The only one I can think of is Cat Gamer, but it’s shonen.
It’s about a lady and her cats.
Nanairo Kakumei (main plot is abt fmc's growth and friendships with other girls, esp her manipulative and lowkey yandere best friend; fmc do fall for a guy, but he is basically a side character and narrative tool and doesn't reciprocate until the very end. completed)
JK Haru wa Isekai de Shoufu ni Natta (a seinen but abt fmc's experiences in a fantasy world as a sex worker; it doesnt shy away from portraying the sexism and misogyny that runs rampant in the industry; she develops meaningful relationships with other women and most guys here are trash. not sure if there's romance but i heard there's a silverfox LI)
Aria (very beautiful and atmospheric sci-fi + slice of life shounen abt female gondoliers exploring a city that's a replica of Venice on Mars. there's some males, but the main focus is on the girls and their friendships. no romance for fmc; completed)
Tsukuritai Onna to Tabetai Onna (a GL josei abt the relationship between a woman who loves cooking and a neighbor who loves to eat; the romance is pretty slow-burn but built well; no men so far)
with little to no men, not romance focused