Cannot run my snap in background

I have a snap that, I want to run in background, I am using the daemon option, but now the desktop file is not working. Also, that app has an option to enable pipewire, that’s also not working, can anyone please help me?

snapcraft.yaml

name: g4music # you probably want to 'snapcraft register <name>'
base: core22 # the base snap is the execution environment for this snap
version: '1.8.2' # just for humans, typically '1.2+git' or '1.3.2'
summary: Single-line elevator pitch for your amazing snap # 79 char long summary
description: |
  This is my-snap's description. You have a paragraph or two to tell the
  most important story about your snap. Keep it under 100 words though,
  we live in tweetspace and your description wants to look good in the snap
  store.

grade: devel # must be 'stable' to release into candidate/stable channels
confinement: devmode # use 'strict' once you have the right plugs and slots
compression: lzo

slots:
  g4music:
    interface: dbus
    bus: session
    name: com.github.neithern.g4music

parts:
  g4music:
    # See 'snapcraft plugins'
    plugin: meson
    source: https://gitlab.gnome.org/neithern/g4music.git
    source-tag: v${SNAPCRAFT_PROJECT_VERSION}
    meson-parameters:
      - --prefix=/usr
    build-packages:
      - gettext
      - libgstreamer1.0-dev
      - libgstreamer-plugins-base1.0-dev
      - libpipewire-0.3-dev
    stage-packages:
      - gstreamer1.0-plugins-base
      - gstreamer1.0-plugins-good
      - libgstreamer1.0-0
      - libgstreamer-plugins-base1.0-0
      - pipewire
    build-environment:
      - LDFLAGS: "-Wl,--copy-dt-needed-entries"
    override-prime: |
      craftctl default
      sed -e 's|Icon=com.github.neithern.g4music|Icon=/usr/share/icons/hicolor/scalable/apps/com.github.neithern.g4music.svg|' -i usr/share/applications/com.github.neithern.g4music.desktop
      sed -e 's|Exec=g4music %U|Exec=snap run g4music|' -i usr/share/applications/com.github.neithern.g4music.desktop
# This part removes all the files in this snap which already exist in
# connected content and base snaps. Since these files will be available
# at runtime from the content and base snaps, they do not need to be
# included in this snap itself.
#
# More info: https://forum.snapcraft.io/t/reducing-the-size-of-desktop-snaps/17280#heading--cleanup-part
#
  cleanup:
    after:  # Make this part run last; list all your other parts here
      - g4music
    plugin: nil
    build-snaps:  # List all content-snaps and base snaps you're using here
      - gnome-42-2204
      - gnome-42-2204-sdk
      - core22
    override-prime: |
      set -eux
      for snap in "gnome-42-2204" "gnome-42-2204-sdk" "core22"; do
      cd "/snap/$snap/current" && find . -type f,l -exec rm -f "$SNAPCRAFT_PRIME/{}" \;
      done
      find $CRAFT_PRIME/usr/share/doc/ -type f -not -name 'copyright' -delete
apps:
  g4music:
    extensions: [gnome]
    command: usr/bin/g4music
    daemon: simple
    desktop: usr/share/applications/com.github.neithern.g4music.desktop
    common-id: com.github.neithern.g4music
    environment:
      GTK_USE_PORTAL: 1
      PIPEWIRE_CONFIG_NAME: $SNAP/usr/share/pipewire/pipewire.conf
      PIPEWIRE_MODULE_DIR: $SNAP/usr/lib/$SNAPCRAFT_ARCH_TRIPLET/pipewire-0.3
      HOME: "$SNAP_USER_COMMON"
    slots:
      - mpris
    plugs:
      - home
      - audio-playback
      - removable-media
      - mount-observe

Please help…

daemon means a systemwide service started as root … if you want to run a desktop application as a part of a user session, read up about the autostart feature instead …

There is an option in the app that packing, to run music in background, even after the app is closed. To implement this, I found only using the daemon feature help me. Any other ways, I don’t think there exists. Also, that app has an experimental option for pipewire, but unable to use that.