Well Greatest Estate Designer is a kr novel that's listed on NU with no BL tags https://www.novelupdates.com/series/the-greatest-estate-designer/ just brotherhood But you can check out the novel raws / comments to find out? I don't think so though
Well mangaupdates list I woke as the villain as BL subplot and Estate designer gave a lot of bl vibes so I wanted to know
Ah, yeah. They are considered very bromance-y. As far as the original publishers are concerned though, they aren't BL, although everyone has a different interpretation of a story. The mangaupdates thing is probably since anyone can edit it, and no one changed it back yet.