that's very broad lol but here
https://www.mangago.zone/read-manga/2020_mgs/
Most popular manwha does have smut, just depends on what you're comfortable with...
BL:
The Pizza Delivery Man and The Gold Palace
Quo Vadis, Domine? (omegaverse)
Bloodbound (guideverse)
Nerd Project
Even If You Don't Love Me
Guiding Hazard (guideverse)
Unsleep
Love Me, Revive Me
Negative Love
The Boundary of Delusion (threesome in first season)
Boredom Alert
Green Apple Paradise (season 3 is where the smut is)
Straight:
tears on a withered flower
flowers are bait
man with ghosts
love is sweet, living together is spicy
love junkie (this one is... complicated)
toying with daddy (ml gets SA'd and mistreated by basically all the women involved in this so far though, this might make you uncomfortable)
can u guys recommend me manhwa that has a smut