Adami covered most of my thoughts.
It's much closer to a fantasy world than scifi, with LOTR and GOT even being mentioned specifically as strong influences. The NOMACS are apparently technological, but if it weren't for seeing the album art, it would be irrelevant, it could be a magical orb for all it matters to the plot. They're barely even mentioned.
Fantasy often includes a technological element, especially in the overlap between the genres/subgenres. It's not black and white there. Dystopian settings also aren't exclusive to scifi, even though it's a commonly used trope in the genre.
The novel will very likely expand on many of the elements that are currently stopping it from being scifi, such as the backstory of the world, and the way the technology (including the NOMACS) has incorporated into the world, but then the ending with magically reviving the dying with music would negate that for me. It's idealistic fantasy, and isn't compatible with the rest being presented as a scifi story as an extrapolation of our world. You could argue it's an alternate world where magical music works, but then we've come full circle back to fantasy again.
As Adami pointed out, the matter of classification isn't meant as an insult or judgement, just calling it for what it is. I basically do nothing but watch fantasy and scifi all day, so it's all good!
But I'm also very aware of this stuff.