Backports music playing even when the game is paused from 1.21.6. Listen to your tunes when changing your settings!
See it in action here: https://youtu.be/AHTUr0IFGYQ
CurseForge: https://curseforge.com/minecraft/mc-mods/nomusicpause
Modrinth: https://modrinth.com/mod/nomusicpause