Bl where the romance isn't the focus like it's part of the plot but it isn't the main plot...

Poyun
Breaking through the clouds: swallow the sea
Madness of heart

They are all crime thriller bls

https://www.mangago.zone/home/mangalist/1235956/

This is a list of them

Rainbow city
Little mushroom
Monochrome rumor

The New Employee
On or Off
Serious Joke
A Painter Behind the Curtains