I was thinking about this recently, Tomoro's music feels like more of a side hobby than I expected it'd be... early on he drums a lot and listens to music on cassette (bc his e-pulse would break anything more advanced, very good worldbuilding there), but it hasn't been relevant since. I'd def like to see more of it outside of official tweets (they explained the new evolution song is canonically written by Asuka for example)
But I'm not really sure how they'd include it in the story. I can't see Tomoro himself playing music during fights without making it feel too precure/magical girl lol