Kinda similar to what KR said about their picks, these novels are listed as LGBTQ+ and not BL even though they center mxm relationships for all of the aforementioned reasons -- but I rec them for sure! (Both of my recs also have wlw relationships, too -- and they're both in corners of the broader Fantasy genre, which is my personal fav.)
OH. But first, I'd love to second CC's Come Hell or High Water that KR linked above. Fantastic contemporary romance with spot-on rep, complex characters, and beautiful descriptive prose.^
ok, so.
I've read the first book of Spirits and Crowns (and am excited to journey into the next books soon!). Dieselpunk Fantasy is pretty rare and pretty wonderful. Deals with themes of revolution, colonialism, abuse/trauma. Very lovely, fastburn relationships between a great set of MCs.
OK so I'm just getting started reading Fractured Magic, but I've seen enough on the series' tumblr page to feel good about the rep. What I've read so far is great and the Victorian-gothic Fantasy setting is fantastic. Features mxm and wlw couples as well -- and there's a lot of artwork associated with the series too!
And I've got one of my own, though it's first and foremost an Epic/Dark Fantasy with a central mxm couple (and other rep that gets explored throughout the series). Probably not for anyone who isn't also very interested in doorstopper fantasy. That said, if you're looking for Lord of the Rings but gayer, darker, and more nautical, this might be up your alley.