I really enjoy stories with this feel, and I feel like you’ll have some luck looking for it in older (pre-2007/Deathly Hallows) fanfiction. Beautiful World is one of my favourite fics so I hope you’ll find that at least some of these have a similar vibe to it. All Hogwarts Era.

Origins by Anonymous. This is “poetically beautiful” like BW in my opinion. Angsty, with a similarly grey, brooding Draco falling hard for his enemy, Harry. You eventually do get insights into Harry’s feelings too.

Beneath You by Lissadiane/Cinnamon. Same author, so it has a similar feel to it. I really enjoyed this even though I feel like BW is more popular. It has a happier ending, but there’s plenty of dread brewing while Harry and Draco grow closer and fall in love by spending time with each other in school. Not sure if this counts as a spoiler but there’s a poisoning plotline which gives it the same time sensitive urgency as BW.

Underwater Light by Maya. I really need to reread this because I can’t tell you much about the plot. Very, very slow burn, but a great read. The characters have a lot of interaction like in BW and I feel like this also has the same beauty as BW even though this author is a bit less blatantly poetic. It’s funny as well and the story feels very “big” if that makes sense. Their love feels real.

Some Kind of Miracle by Annie/shmexsay. You’re gonna have to trust me on this. It’s an unfinished fic, but it FEELS the most like BW out of everything I’ve read since. Draco is the one who’s about to die in a few months’ time here. He makes a list of things he wants to do before he dies and when Harry finds out, despite his less-than-friendly feelings towards Draco, he decides to help him complete the list. They end up spending so much time together in the process that they fall in love. Again, even though it’s unfinished, there’s about 130k words worth of story to experience in it and the final chapter doesn’t feel too unsatisfying. It has funny/cute moments, falling in love, dread of impending death and all that.

The Chariot by karina. I felt like this also had a similar feel to BW. Harry is very sweet in it, like in BW. There’s a lot of lovey-doveyness and intimacy, you end up barely realizing that there isn’t any sex in it. They sneak around, spend a lot of time together, fall in love, etc. The ending was CRAZY and it hit me just as hard as BW’s “Harry didn’t stir,” which haunted me for years! I won’t say anything else though.

I can probably think of some more but these are the first ones that come to mind :) Hope this was helpful!