Lost and Found
Bring the Love
An Innocent Sin
You can try Badluck, it's a comedy school life, it was so hilarious just read it few weeks ago
It's about a girl who can curse anyone and the story was about finding a cure,
the class rep who's a girl was inlove with the female MC and the female MC's bestfriend who's a guy was also inlove on a another guy which is their classmate which is mutual so i can say some fl and bl was there but wasn't the main plot of the story
If you interesting in thriller/solving crimes I super recommend Stigmata. It's so good
http://www.mangago.zone/read-manga/reincarnated_into_demon_king_evelogia_s_world/ Smutty but still has a promising adventure plot with a fantasy game setting (yaoi isekai)
Devil number 4 on webtoon: supernatural story with a solid plot about demons/angels organisation, straight main couple, compelling gay side couple (pairing: Devil number 3 and Peace. That’s their name lol)
Any story by this author http://www.mangago.zone/read-manga/hengoku_no_calendula/ she makes yaoi with shonen-like plot (with adventure, fantasy, battles or investigation - depends of the manga) This one is my fav of her and has a solid plot
Phantom paradise on webtoon - shonen-ai and much action-focused (the couple get so together later in the story). eastern fantasy and great art!
Okay that’s all I can think about, I will add some stuffs if more come to mind
any genre with gay side characters or with a gay mc but the romance isnt the whole plot (like how in any fantasy or isekai the ml inevitably ends up with a pretty fl but gay i guess)